United Kingdom

July 2026 United Kingdom

We have released the following new templates for ONESOURCE Corporate Tax:
Template
FY24
FY25
FY26 (new)
United Kingdom Entity
1.411
1.420
1.129
United Kingdom Life
1.105
1.078
1.025
United Kingdom Group
1.086
1.109
1.019
United Kingdom Non-OCT
1.013
1.007
1.004
These template versions will become the default templates when you create a new calculation.

Upgrade to the latest template

When you open a calculation, you may be requested to upgrade your calculation. If you want to upgrade, select
Yes
. There is also an option to run a comparison between the old and new template. Refer to Upgrade Templates.
If you want to upgrade to a template that isn't the latest version, select the
More
 button on the Calculation for that entity and select
Upgrade to
. Refer to Upgrading to an Earlier Version of a Template.
You also have the option to upgrade multiple templates at the same time. Refer to Upgrading Templates in Bulk for help.

Release summary

The FY26 computation templates are now available for periods ending on or after 1 April 2026. Full details of all other content changes are as follows:

Additional rows - various sheets

Additional "Other" rows
  • There are now three fixed "Other" rows available on the
    Defined benefit pension
     sheet within the "Movement in period:" and "Net return" sections.
    When using these rows for importing, use descriptions "Other 1", "Other 2" and "Other 3" for the "Movement in period:" section and for the "Net return" section, use descriptions "Net return other 1", "Net return other 2", and "Net return other 3".
  • We have also added three fixed "Other" rows onto the
    Finance lease debtor
     sheet. When importing, use descriptions "Other 1", "Other 2" and "Other 3" for these rows.
  • You are also now able to insert rows within the “Other”, “Management expenses” and “Deductions from total income” sections on the
    Interest Distributions
     sheet. Reporting has been updated to include all data on the sheet.
These changes have been made for FY26 only.
Additional data entry rows in the reconciliation sections
You can now insert multiple data entry rows into the “Reconciliation” section in the following sheets:
  • Tangible fixed assets note
  • Intangible fixed assets note
  • Additions analysis (Tangible and Intangible)
  • Disposals analysis (Tangible and Intangible)
  • Provisions
  • Defined contribution pension schemes
  • Defined benefit pension
  • Right of use asset note
These changes have been made for FY26 only.

Computations attached period selector

Ability to select the period for which accounts and computations are attached
We have updated 2023 templates onwards to use the latest HMRC Schema.
We have added selectors to the
Return information
 sheet to allow you to specify which accounting period you are attaching your accounts and computations to. The options are as follows:
  • Attached for period
  • Attached for a different period
  • Not attached
The default setting for both the “Accounts attached?” and “Computations attached?” selectors is "Attached for period".
In a multi-period file, you can only select one accounting period to attach your accounts and computations to. For multi-period files you will therefore need to change this option on the
Return information
 sheet for one of the accounting periods to “Not attached”.
We have added a new column to the
Permanent information
 sheet to display which period you are attaching the computation to. An error will display on this sheet if you have inadvertently selected one of the "Attached" options for more than one accounting period.
These changes have been implemented for FY25 and FY26.

Cross border royalties

Cross-border royalty sheet - change in orientation
We have changed the orientation of the
Cross-border royalties
sheet so you will now insert a row for each recipient, instead of a column. The change provides you with a better presentation, especially when you have multiple recipients. Data rolled forward from FY25 to FY26 will carry forward as expected.
For FY26 Early Build files created from a FY25 template:
  • Export the calculation before upgrade and copy / paste data back into the FY26 template post-upgrade.
  • You may need to select
    Reset frozen panes
     to scroll to the right of the sheet.
This change has been made for FY26

Currency

Sheets no longer fixed to GBP
We have removed the default GBP format from the
Trade summary
,
Loss summary
,
Derivative movements disregarded
 and
Sundry adjustments to derivative movements
 sheets.
These changes have been made for FY26. Please note that if you have already created a FY26 calculation using the FY25 template and have changed the currency of the calculation, some columns on the sheets listed previously may not automatically convert to that currency when either upgrading to FY26 or rolling forward from FY25 to FY26.
If this is the case, you can manually update the currency by either:
  • Setting the entire sheet to GBP via
    Currency
    Sheet
    , or
  • Setting individual columns to GBP via
    Currency
    Columns
    .

Double Tax Relief (DTR)

DTR adjustment
An "Other" row has been added to the “Double taxation relief summary" table at the bottom of the
Tax calculation
 sheet. This allows you either to make adjustments to the amount of DTR calculated on one of the
Double tax relief
 sheets or you may wish to link a figure from your own DTR calculations.
This change has been made for FY26 only.

Efiling

Attachments now required when validating option – efiling wizard update
We have updated the software to ensure that where an attachment is required for the submission of a return, it will need to be included at the validation stage. A new setting, "Require attachments during validation", has been added to the settings menu to control this behaviour (Administration > Settings):
  • When enabled: all validation errors, including the requirement to include an attachment, will be fully enforced during the validation stage of the efiling wizard.
  • When disabled: the attachment option is still available during the validation stage, however, the validation error relating to missing attachments will be skipped, allowing the rest of the computation to be checked without the required attachment. The attachment will still need to be included before submitting to HMRC.
This change applies to FY25 and FY26 templates only. For FY24 and earlier, or any template that does not include the updated configuration column, the setting will default to the disabled behaviour regardless of the selected option — meaning attachment-related validation errors will be skipped and attachments will not be checked at the validation stage.
CT600L R&D zero-suppression correction
The schema has been updated to ensure there will always be a value in box L71A when the tax credit cap exception applies and box L71 is ticked, even when the qualifying expenditure of externally provided workers and qualifying contractor expenditure is £0.
The changes have been made for FY25 and FY26.
CIR Interest restriction return (IRR) export option enabled
You are now able to export a version of the IRR file that can be independently submitted to HMRC.
The changes have been made for FY25 and FY26.

Finance lease debtor (and supporting) sheets

Finance lease debtor (lessor) – non qualifying additions and disposals
Assets leased under a finance lease are ‘de-recognised’ as tangible fixed assets and instead recognised as receivables on the lessor’s balance sheet. For tax purposes, these assets may still qualify for capital allowances. Accordingly, OneSource requires each qualifying finance lease addition to be included in the main
Additions analysis
 sheet to enable subsequent inclusion in the relevant capital allowances sheet.
Previously, all finance lease additions were automatically brought into the
Additions analysis
 sheet. This release refines that behaviour so that assets categorised as “non-qualifying” on the Finance lease additions sheet are excluded from the
Additions analysis
 sheet, as they do not require inclusion in any capital allowances analysis.
The same treatment has been applied to finance lease disposals whereby assets categorised as “non-qualifying” on the
Finance lease disposals
 sheet are no longer included in the
Disposals analysis
 sheet.
These changes have been made for FY25 and FY26.
Finance lease debtor (lessor) - additions and disposals
When additions are entered onto the
Finance lease additions
 sheet, a corresponding row automatically inserts into the main
Additions analysis
 sheet for each asset. The same applies for finance lease disposals which are inserted onto the
Finance lease disposal
 sheet.
Previously, you were then required to manually enter the total of finance lease additions and disposals into the reconciliation section of the
Additions analysis
 and
Disposals analysis
 sheets. This step has now been automated.
Due to the changes outlined above, the total of the assets brought into the reconciliation sections on both the
Additions analysis
 and
Disposals analysis
 sheets excludes non-qualifying assets.
These changes have been made for FY25 and FY26.
Please note, when you template upgrade an existing FY25 computation and have already manually entered a finance lease addition or disposal into the
Additions analysis
 or
Disposals analysis
 sheets, this entry will now need to be removed as the reconciling item will now be automatically added to both sheets.
Finance lease debtor (lessor) - capital adjustment
New functionality has been added to the
Finance lease debtor
 sheet to provide you with more flexibility when dealing with the capital element of finance lease rentals receivable.
To do this, we have adapted the existing business analysis section at the bottom of the sheet and made this section display at all times when a trade exists within the file. This section has been re-named “Finance lease capital adjustment” and allows the capital element to be entered where an adjustment is required to your trade profit. This treatment was previously only possible when using the Long-funding finance lease column.
In a single trade file, this new section is automatically populated with the capital element for the following lease types / columns:
  • Short finance leases
  • Lease and leaseback arrangements
  • Sale and leaseback arrangements
The ‘Other’ columns remain as flexible data entry fields and can now be used for both:
  • Leases assessable to tax on a gross basis; and
  • Leases not assessable on a gross basis.
Amounts automatically linked or entered manually into this section are added back on the
Adjustment of profit
 sheet.
As before, the capital element relating to Long-funding finance leases is not added back on the
Adjustment of profit
 sheet.
Where more than one trade exists in the file, the capital element for each lease type must be apportioned manually across the relevant trades.
Please also note the following for multi-trade files:
  • The new "Business analysis - finance lease capital adjustment" section requires positive figures, whereas the old "Business analysis" required negative figures. Upon template upgrade, check errors will therefore appear, requiring you to reverse the signage of your previous entries.
  • There is a new "Business analysis - commercial depreciation on long funding operating leases" section. If there is any commercial depreciation entered into the existing cell, you will now need to re-enter the business allocations again into this new section.
  • Linked to the above, where you had previously allocated commercial depreciation to a business in the old "Business analysis" section, these analysis cells are now blank (replaced by the new table). On template upgrade, you will get an error to ‘Reset to template cell’ which will upgrade the cell to a white non-editable cell.
These changes have been made for FY25 and FY26.
Finance lease debtor (lessor) – capital adjustment – tax accounting
Following on from the updates to the finance lease debtor and supporting sheets, we have made the following changes to the tax accounting sheets:
  • Added in new row on the
    Comparison of CT and DT movements through I/S
     sheet for “Finance lease capital adjustment”. This is allocated to the “Timing/Temporary differences – trading” column by default, but can be reallocated, if required, by using the selector at the bottom of the sheet.
  • Added in a new row on the
    Proof of tax
     for “Finance lease capital adjustment” in the “Timing/Temporary differences – trading” section. This is allocated, by default to the “Expenses not deductible” column but can be reallocated if required.
Commercial depreciation on long funding leases:
  • Whilst updating the sheets for the capital element of finance leases, we noticed that an adjustment for “Commercial depreciation on long funding leases” also needed to be added to the
    Comparison of CT
     and
    DT movements through I/S
     sheet. This is allocated to the “Fixed assets” column by default but can be reallocated, if required, by using the selector at the bottom of the sheet. We have not added a row to the
    Proof of tax
     sheet for this, so if any adjustments are required to that sheet, then these should be entered manually.
These changes have been made for both FRS102 and IFRS, for FY26 only.
Tangible fixed asset realised through use – new row
A new data entry row has been added within the “Qualifying NBV” section of the Tangible fixed assets realised through use sheet for FRS102. This enhancement provides additional flexibility in the NBV section, aligning it with the existing functionality available in the lower TWDV section. As part of the wider improvements to the finance lease debtor (and supporting) sheets, this row enables you to include the NBV of finance lease additions and finance lease disposals that are not included on the Tangible fixed asset note.
This change has been made for both FY25 and FY26.

Fixed assets and capital allowances

Structures and buildings allowance (SBA) - support sheet
We have added a new Structures and buildings allowances support sheet to allow you to further analyse your SBA expenditure.
The support sheet is multi-instance, and each sheet inserts a corresponding row onto the main Structures and buildings allowances sheet, with the column totals being brought through. Data is tagged and filed at the lowest level. Where the support sheet is used, data will be submitted from the support sheet and the corresponding parent row will not be tagged.
When you are using the new Structures and buildings allowances support sheet to analyse current period additions, you must first switch off the selector "Insert SBA additions into capital allowance sheets?" on the
Permanent information
 sheet. If analysis is required for an existing row, the row must be deleted from the parent
Structures and buildings allowances
 sheet and reinserted via the support sheet.
These changes have been made for FY26 only.
Transfer of trade column links
We have linked the "Transfers in" row from the Tangible fixed asset note to the "Reconciliation" section of the
Additions analysis
 sheet. If the transferred assets relate to a transfer of trade, you can use the new "Transfer of trade" column on the
Additions analysis
 sheet to enter the relevant amounts. If the assets have not been transferred in as part of a transfer of trade, then you should allocate them to the appropriate column depending on what they relate to e.g. Main pool, Special rate pool, Non-qualifying etc.
In the
FRS102 tax accounting
 sheets, assets transferred in are treated as assets transferred in as part of a trade transfer on the
Fixed assets realised through use
 sheet. If this is not correct, you can use the data entry row to reallocate them to the "Additions" column instead. The same behaviour applies for assets transferred out - you can use the data entry row to reallocate them from transfers out to disposals.
These changes have been made for FY26 only.

Group

Group profit and loss summaries column display changes
We have added a new "Print zero-value columns?" selector to the bottom of the
Profit summary
 and
Loss summary
 sheets in Group which functions as follows:
  • The selector defaults to "On" and rolls forward to future periods.
  • When the selector is "On", all entity columns are displayed in Final mode, regardless of their values.
  • When the selector is "Off", any entity column containing only zero values is displayed in Review mode and excluded from the final print output.
These changes have been made for FY24, FY25 and FY26.
Group relief sheets display updates
We have made minor display changes to the headings on the
Losses matrix
,
Carried forward losses matrix
,
RDEC
 and
Patent box
 sheets within the group module for consistency across the sheets.
Additional updates to the Losses matrix are as follows:
  • "Amounts offset within company excluding group relief:" has been moved to the top of the sheet for improved visibility.
  • Display logic updated so companies with surrenderable losses that are not surrendered do not print in final (but remain visible in review mode).
These changes have been made for FY24, FY25 and FY26.
Group RDEC pushdown
RDEC amounts pushed down from the Group Module to the RDEC Group module data transfer sheet will now automatically insert rows on the
Credit surrendered
 sheet.
These changes have been made for FY25 and FY26.

Intangible fixed assets

Updates
Where IFA additions are entered directly into the
IFA analysis
 sheets (instead of being inserted automatically from the
Additions analysis
 sheet), the acquisition cost will now flow automatically into the TWDV and Tax cost sections (where applicable).
Where an IFA has been transferred in under the provisions of s775 CTA 2009 then the increase to TWDV and Tax cost is expected to be a different figure to the accounting value. Therefore, a validation error will appear to prompt you to manually enter these amounts.
If the company has more than one accounting period, a new "Date of acquisition / transfer in" column will appear and is mandatory for all additions and transfers in, in order for the increase in TWDV and Tax cost to be reflected in the correct accounting period.
These changes have been made for FY25 and FY26.

Legislative changes

Electricity generator levy benchmark amount
We have added the new benchmark amount of £82.61 to the
Electricity generator levy
 sheet. This is applicable to the financial year 1 April 2026 to 31 March 2027.
This is relevant for FY26 files only.
Electricity generator levy rate increase
The rate of the Electricity generator levy increased from 45% to 55% on 1 July 2026. We have added this new rate to the
Electricity generator levy
 sheet and, as per HMRC guidance, where a period straddles 1 July 2026, the receipts for the period are apportioned on a time basis and the amount attributable to the later part of the period is now charged at 55%.
This is relevant for FY26 files only.
Creative expenditure credit sheet - review note
We have added a review note to the bottom of the
Creative expenditure credit
 sheet to remind you that for opt-in periods beginning on or after 26 November 2025, any expenditure previously classified as European expenditure should be classified as UK expenditure on this sheet, to ensure that it continues to be treated as qualifying under the VGEC regime.
This note has been added for FY25 and FY26.
Loans to participators rate increase
HMRC announced the Loans to participators rate increased from 33.75% to 35.75% for loans made or benefits conferred on or after 6 April 2026. We have added this new rate to the
Loans to participators
 sheet. However, HMRC also confirmed that the Corporation Tax online service will not be updated to reflect this change until 6 April 2027. HMRC have advised that if the new rate applies to your company and you need to file before 6 April 2027, you will need to amend your return after 6 April 2027 to reflect the new rate.
This is relevant for FY26 files only.
Main pool WDA rate change
Finance Act 2026 reduced the rate of writing-down allowances for the main pool from 18% to 14% from 1 April 2026. This has been reflected on the
Financial year tax rates
 sheet. For accounting periods straddling 1 April 2026, the software will calculate a blended rate on the
Computation rates
 sheet based on the number of days in the period prior to 1 April 2026 and the number of days in the period after this date.
This is relevant for FY26 files only.
Associated companies references
We have updated references to "51% companies" to "associates" throughout the software. The changes have been made to FY25 and FY26.
New investment zones
We have added North East of Scotland and Glasgow City Region to the list of "Investment zones" for both FY25 and FY26.
New form CT600A (Close company loans and arrangements to confer benefits on participators)
We have added the updated CT600A (2026) version to FY25 and FY26 computations.

Loan relationships

Transfer pricing adjustments to non-trade loan relationships (NTLR)
We have updated the interaction between the
Transfer pricing adjustment
 sheet and the
Loan relationships and derivatives
 sheet to accumulate NTLR adjustments on the
Transfer pricing adjustments
 sheet before sending a single row to the Loan relationships and derivatives sheet.
These changes have been made for FY26 only.

Losses

Loss restrictions for banking companies
For banking companies, the offset of certain brought forward losses is restricted to 25% of relevant profits, as opposed to the general 50% restriction. To help with these calculations, we have added a new
Banking company - pre-2015 losses
 sheet. This sheet, which is available for banking companies only, allows you to enter pre-2015 losses brought forward and will calculate the maximum offset against relevant profits. The sheet also enables the utilisation of the "carried-forward loss allowance" by allowing you to enter the amount of any loss designated under s269CH CTA 2010.
Note that any losses entered on this sheet must be included within the figures in the "pre April 2017" column in the standard loss sheets, e.g. Trade losses, Non-trading deficits on loan relationships or Management expenses.
The new sheet is available in the FY26 template.

Partnership income (loss streaming / tax analysis)

Income from partnership sheet
A new optional
Income from partnership
 sheet has been added to allow you to input or import partnership income and related items for corporate partners and may also be used to capture amounts from other tax transparent entities. Multiple sheets can be created as required. The
Income from partnership
 sheet supports both manual entry and import of data.
Where data is imported from a ONESOURCE United Kingdom Partnership Tax computation, it is recommended that you extract data from the partnership computation by running the report "Partnership – Partner allocation summary" and saving this to Excel. Office Scripts may be leveraged to transform the data into the required format for import into the corporation tax computation.
The "Category" selected determines where the amount feeds within the corporation tax computation. For example, selecting the category "Business - trade or property" inserts amounts onto the
Adjustment of profit
 sheet. Other categories map to their respective schedules within the computation. Amounts categorised as "Other" do not feed to the computation.
This enhancement provides a more structured approach to incorporating partnership results into the corporation tax computation, improving usability and auditability.
This change has been made for FY26 only.

Pension spreading

Pension sheets override column
An override column has been added to the
Defined benefit pension schemes spreading
 and
Defined contribution pension schemes spreading
 sheets. This allows you to override the amount of spreading applying in each accounting period.
This functionality may be particularly relevant where there is a cessation of business resulting in multiple accounting periods.
This change has been made for FY26 only.

Reporting, importing and tagging

Hybrid mismatch reporting
Reporting has been set up for the following:
  • Hybrid and other mismatches sheet. The report name is Hybrid and other mismatches - Summary.
  • Hybrid and other mismatches supporting sheets:
    Counteractions
    ,
    Adjustments in light of subsequent events etc
    ,
    Dual inclusion income (DII) claims and surrenders
     sheets. The report name is Hybrid and other mismatches - Supporting schedules.
These changes have been made for FY25 and FY26.
Import markup
Markup has been added to all multi-instance sheets, enabling support for single cell import on these sheets where rangenames and xmlNames exist.
These changes have been made for FY24, FY25 and FY26.
Expense and income "Analysed as" column import
We have updated the software to ensure that where items are imported with the same description but different "analysed as" selections they will remain separate.
The changes have been made for FY24, FY25 and FY26.
Disposal analysis importing
Import functionality has been added to the columns "Electric charge points", "Enterprise zones", "Zero emission goods vehicles", and "Zero emission cars" on the tangible fixed assets
Disposals analysis
 sheet.
These changes have been made for FY25 and FY26.
Additional DPL tags added
New DPL tags have been added for the following:
  • Purchase Raw Materials Consumables
  • Lease expense, lessee
  • Interest expense on lease liabilities
  • Off payroll working expense
These changes have been made for FY25 and FY26.
Combined analysis sheet tagging
We have updated the software to ensure any combined analysis sheets are correctly tagged by the tagging wizard.

Tax accounting – FY26 only

Change in basis adjustments - IFRS
We have updated the
Tax basis balance
 sheet so that each individual row from the Change in basis adjustments sheet posts into the bottom of the sheet, rather than the total change in basis adjustments coming through on one row. Hopefully this will allow you to review each adjustment separately and, if you are using the
Populate tax basis balance sheet?
 option, to choose the relevant
Tax basis balance sheet category
 for each individual row.
Change in basis adjustments - FRS102
We have made some updates to how the
Change in basis adjustments
 sheet interacts with the
Gross timing differences
 sheet if the
Adjustment type
 on the
Change in basis adjustments
 sheet is set to
Trading / property income
. We have made this enhancement as we are aware that these adjustments can either be trading timing differences or fixed asset timing differences. By default, the adjustments will still flow into the "Timing differences – trading" section on the
Gross timing differences
 sheet. However, if the change in basis adjustment actually relates to a fixed asset balance, then when you change the "Disclosure note caption" selector to "Fixed assets" the change in basis adjustment row will move into the "Fixed assets" section. The same logic applies for property change in basis adjustments that post into the "Timing differences - non-trading" section - these can be reallocated to the "Fixed assets" section by changing the selector.
Please note, the amount will only be reallocated between the sections if the "Disclosure note caption" is changed to "Fixed assets". If you choose any other "Disclosure note caption", whilst the amount will be re-categorised correctly, the row won't move between sections.
Please note, this new behaviour for change in basis adjustments is different to how other rows on the
Gross timing differences
 sheet work when you change the "Disclosure note caption". In all other cases, although changing the caption will make sure your disclosures reflect the new categorisation on the
Tax account and Accounts disclosure
 sheets, the row itself will not be moved on the
Gross timing differences
 sheet. Going forward we will investigate whether we can build out this new functionality of reallocating between sections for other items into a future release. We are still confident that most items are posted to the
Gross timing differences
 sheet automatically into the most relevant section.
Capital losses – FRS102 and IFRS
We have updated the
Gross timing differences
 sheet (FRS102) and the
Tax basis balance
 sheet (IFRS) to ensure that capital losses flow through automatically from the
Capital losses
 sheet. We have also reviewed and updated the Proof of tax to capture more reconciling items automatically in respect of capital gains and capital losses.
Qualifying charitable donations - IFRS
We have updated the
Comparison of CT/DT movements
 sheet so that any adjustments in relation to qualifying charitable donations flow to the "Temporary differences - non-trading" column by default.
Removal of automatic links for non-qualifying assets – FRS102 and IFRS
We have updated the
Tangible fixed asset analysis
 sheet to remove the automatic links from the non-qualifying column on the
Fixed asset additions
 sheet and also data from the
Fixed assets disposals
 sheets.
We have identified scenarios where pulling through these figures automatically isn't always the correct behaviour, especially if the item is already being analysed separately in a different column on the
Tangible fixed asset analysis
 sheet and therefore could potentially be double counted. As such, we decided it would be safer for you to populate the non-qualifying column manually, with the data that is relevant to your computation.
This change has also meant there is no longer the requirement to use the "Remove non qualifying capital items expensed" on the
Tangible fixed asset analysis
 sheet as these amounts will no longer link through to this sheet. Instead, you will need to add a reconciling item to the Proof of tax for these amounts.
Tax account updated wording – FRS102 and IFRS
We have updated the wording of the first row in the "Foreign tax payable" section on the Tax account. This now says "Overseas tax" rather than "Current period".
Tax account - more prior year rows – FRS102 and IFRS
We have updated the Tax account so that it includes prior period rows for the previous six years, rather than just three years.
Group relief and other payments - more prior year rows – FRS102 and IFRS
We have updated the
Group relief and other payments
 sheet so that it includes prior period rows for the previous six years, rather than just three years. The additional new rows have been added to each section on this sheet.
Removed wording on "other" rows – FRS102 and IFRS
We have removed the word "Other" from blank rows - you can now just give the row a caption heading that is relevant to your scenario.
Pillar Two disclosures – FRS102
In line with the requirements of FRS102, we have updated the tax note in the
Account disclosure
 sheet to separately identify amounts in relation to Pillar Two for both current tax and prior year adjustments. We also separately identify the debtor or creditor balance in respect of Pillar Two.
These changes have also been reflected in the Accounts disclosure at group level.

Other miscellaneous changes

"Calculation not using the correct tax year template" error
An error already appears on the
Permanent information
 sheet if the template year is too low based on the period of account end date. This error has been modified so it will now also show if the template year is too high. In effect, the error will now appear whenever the template year does not agree with the financial year which the period of account end date is in.
This change has been made for FY26 only.
Provisions "type" prior period check
We have added a new validation to the
Provisions
 sheet to alert you when the provision 'Type' in the current period differs from the prior period. Two new columns, "Prior period Type" and "Current period Type" have been added to provide a side-by-side comparison of provision type. Where a change in type is identified in the current period, the validation will be triggered. Once reviewed, the validation can be cleared by setting the "Changes to 'Type' are correct?" selector to Yes.
These changes have been made for FY25 and FY26.
New CT600 box validation relating to company size for R&D claims
We have added a validation that fires on the
Return information
 sheet when the "R&D claim additional information form submitted" flag, for CT600 box 657, has been set to "Yes", but you have not confirmed the company size. The "R&D claim made by SME" flag, for CT600 box 650, on the
Return information
 sheet is automatically set to "Yes" when either the
Enhanced R&D intensive support
 or
R&D enhanced expenditure
 sheets are in the file. However, where the R&D claim relates to RDEC, you must manually select either the "R&D claim made by SME" or "R&D claim made by large company", for CT600 box 655, flags in order to pass the HMRC efiling validations.
This change has been made for FY25 and FY26.
Non-creative company claiming AVEC
We have improved the way that the software deals with a company that does not have its own creative business but receives a step 2 or 4 creative expenditure credit from a group company. In this scenario, you can now insert the CT600P, but there will be no errors requiring any of the other sheets related to creative businesses to be inserted.
These changes have been made for FY25 and FY26.
RPDT allocation statement
We have amended the software to allow you to confirm the "RPDT Allocation statement" has been sent to HMRC even when they are not the "Nominated company".
The change has been made for FY25 and FY26.
Employee share acquisition relief correction
We have amended the calculation of relief on the
Employee share acquisition relief
 sheet so that where consideration received exceeds the market value of the shares acquired, relief due will show zero to prevent a negative relief being taken to the
Adjustment of profit
 or
Investment business
 sheet.
This change has been made for FY25 and FY26.
Loans to participator updates
We have corrected a rounding issue between the calculated values on the sheet and the CT600.
Additionally, you are no longer required to develop the CT600A unless additional loans have been made in the period.
These changes have been made for FY25 and FY26.
Marginal relief correction
The software has been updated to ensure marginal relief is not calculated where the type company is set as non-resident.
The changes have been made for FY25 and FY26.

This article applies to:

  • Product: ONESOURCE Corporate Tax