R2026.03 | March 2026
Key release highlights
This table gives a gist of the key highlights coming with this release which solve pertinent business challenges of our customers and ensures an improved user experience on ONESOURCE Indirect Tax Compliance platform.
Business challenge | How OIC can help | Product updates in this release |
|---|---|---|
Importing data is time-consuming and manual. Errors required users to exit the application, correct the source file externally, and re-upload—a repetitive process that slowed workflows, especially for large transactional volumes. | The Import Self Service feature eliminates manual re-uploads. Users can now review, correct, and reprocess errors directly within the application. This provides instant validation and clear guidance, significantly reducing time spent on imports and lowering compliance risk. | The Import Self Service feature provides an intuitive and efficient way to handle data issues, focusing solely on streamlined error resolution.
Complete audit trail: Maintains a transparent, detailed log of all corrections for compliance and review. |
Legislative updates
Thomson Reuter’s content team are constantly monitoring changes in indirect tax legislation to ensure the latest requirements from the jurisdictions covered are supported in our content.
France VAT return
– the new 2026 pdf form has been updated under V sheets in the Main Return SectionBulgaria Intrastat
– captions changes have been made in the Intrastat report to reflect the latest formsRomania VAT return
– the new form D300 pdf form has been updated under V sheets in the Main Return section. The old VAT rates (19%, 9% and 5%) and boxes dedicated to them has been removed.Spain VAT return
– The e‑filing schemas have been updated so that values in the newly added Return Summary boxes are now correctly taken from the VAT return data. This replaces the previous behaviour where these boxes were automatically defaulted to zero following their introduction in the February release for January reporting. Additionally, schemas corresponding to the last reporting period have been updated to mimic the same logic. The changes apply to the following fields:- tick box (YES/NO selector) on "petrol purchases" in P Sheet
- box 112 in form 303
- box 112 in form 322
Turkey VAT Declaration KVD1
- Changes to the VAT declaration apply starting from the January 2026 tax period. Updates include introduction of a new deduction type related to Cancellation of Refund Declaration and removal of a specific transaction type (code 1014) as well as changes in Section 01 and Section 03 (Blocks E1 and B1). These updates are reflected I the return summary sheets and in the e-filing schemas.VAT returns/listings
Egypt ACC content
- changes have been made to the box descriptions displayed in the tax code mapping tables to ensure the descriptions are unique and can be accurately matched to the boxes in the return summary. - Inconsistent formulas have been fixed to ensure the boxes with Adjustments are correctly captured in the return summary as well as the pdf form under V sheet.France ESPL and Intrastat report
– new fields SIRET and PSIID have been added to the system. The schema has been updated to use SIRET field and new field that contains VAT registration ID&SIRET that will feed into PSIID in the filing output when e-filing the combined ESPL and Intrastat report. Previously the PSIID was mapped only to Company VAT registration number. Additionally, a warning will be displayed when the character length is exceeded for field PartyName as the tax authority software only allows a maximum of 14 characters. Ireland Annual return (RTD form)
– the formulas for reporting several tax codes related to Imports of goods have been revised to ensure the tax amounts are correctly captured in box PA2 (Postponed Accounting)Slovakia VAT return
– the formula for reporting tax code Import with deferment or license - input and output (23%) has been revised, to ensure it populated boxes 11e and 12e, previously the Vat amount was incorrectly included in box 10b. Slovenia
– the logic has been updated in the Sales and Purchase ledger sheets to ensure the transactions are correctly reflected in the appropriate sections of the ledger report.Sweden VAT return
– an issue affecting the XML file used for e‑filing the Swedish VAT return has been fixed. This correction ensures the file is generated with the correct encoding for successful submissionUAE VAT return
– the formula for reporting the Partial exemption adjustment in box 10 related to Reverse charge Input-only non-attributable using standard 5.00% rate has been revised and now displays a tax amount, as previously it was mapped to the net value.United Kingdom
- the header in I sheet has been changed from "Domestic Reverse Charge Purchases" to "Reverse Charge Purchases" which includes all types of transactions not limited to domestic tax codes.E-filing and coverage expansion
Australia BAS
– the schema used for e-filing has been updated to the latest version published by the ATO.Germany e-filing system
was updated to allow 2026 Annual VAT submission.Netherlands 2026 ESL Call-Off Stock Taxonomies
were incorporated into softwareImproved Accuracy of AU BAS XML Filing:
The AU BAS XML e-filing workflow has been enhanced to provide consistent progress tracking for individual submissions. This update ensures that the current filing status is accurately reflected throughout the process, offering improved oversight and confirmation of submission activity.Performance improvements to JPK_CIT_KR_PD report
Great news! A major performance optimization has been successfully implemented for the JPK_CIT_KR_PD report. This enhancement significantly reduces the report generation time even for high‑volume datasets up to 2 million transactions, where the report now completes in approximately 13 minutes.
Returns
Enhanced Flexibility in Returns Navigation:
A new configuration option now lets users decide how Returns are accessed in their browser. This feature enables a tailored navigation experience, giving you the choice to use a single-tab workflow or open Returns in a separate tab making data comparison simpler and supporting more effective multitasking.Language Selection in Read-Only Mode:
Language settings can now be adjusted even when a Return is in read-only mode. However, an edition to the workbook won't be possible. This change facilitates document review in a preferred language without requiring edit permissions. 
API updates
Import Status API – Additional Status Indicators
Two new informational status values have been introduced in the Import Status API response as part of the new Import Self Service enhancement (Refer here):
- Rows with no errors uploaded successfully
- Rows with no errors imported successfully
These statuses help distinguish successful upload and import scenarios and may appear in responses from the import status endpoint. No changes are required to existing integrations.
IMPORTS
Import Self Service
The Import Self Service feature provides
enhanced error management capabilities
for your transactional data imports. Instead of exporting error files, correcting them offline, and re-uploading the entire file, you can now analyse, correct, and reprocess data directly within the ONESOURCE Indirect Tax Compliance application.note
This is a soft launch so it's not yet activated for all customers. If you're interested in using this, contact the support line or a member of the ONESOURCE team.
New Errors Grid: Analyse and Group Errors
- The Self-Service errors tab is automatically available when the import process results in specific statuses, indicating the presence of correctable data validation errors: Import Failed, and two newly introduced statuses: Rows with no errors uploaded successfully, and Rows with no errors imported successfully.
- This can be accessed via the Imports screen new column 'Pre-import edits' hyperlink.
- Errors are grouped by message and category (e.g., missing data, format issues).
- Advanced filtering and sorting options available; export visible error lists as needed.
New Edit Feature: Inline Corrections
- Direct editing of error cells with context-sensitive input controls.
- Error Details Panel provides error codes, descriptions, and step-by-step resolution guidance.
- Edit Log of all audit details and user date and time stamps.
note
Please find detailed information here, on Help and Support.
Other updates
HMRC Currency Exchange Integration:
Automated retrieval of official GBP exchange rates from the HMRC portal is now available to streamline currency conversions for UK tax filings. This integration ensures data accuracy by automatically mapping currency codes and eliminating manual entry, providing a reliable foundation for foreign currency transactions.- "HMRC" is now available as a selectable exchange rate source.
- The "UK HMRC Exchange Rates Report" has been introduced to provide a comprehensive list of all recorded HMRC rates within the system.
License Period Validation Alignment:
System validation has been enhanced to ensure return periods align accurately with customer license start and end dates. This update provides consistent availability of templates within authorized timeframes and enforces strict compliance by preventing return creation or roll-forward activities outside of active license windows.Persistent Client Selection Accuracy:
Session state management has been refined to ensure that the active client selection is correctly updated and maintained upon login. This update ensures that the application workspace consistently reflects the current selection, providing a reliable and seamless transition between different client environments. Corrected SII Submission Data Display Based on Date Filter
SII Submission screen In this release, the functionality of the SII Report Submission Date filter has been updated to ensure accurate and consistent results. Previously, users had to select a date one day later than the actual submission date to display the correct records. This issue has now been resolved. Additionally, the SII screen no longer displays records by default when no date range is provided. Instead, the screen remains blank until a specific date range is entered in the search filters, ensuring that results are displayed only when a defined range is selected.
Improved Accuracy of AU BAS XML Filing
The AU BAS XML e-filing workflow has been enhanced to provide consistent progress tracking for individual submissions. This update ensures that the current filing status is accurately reflected throughout the process, offering improved oversight and confirmation of submission activity.
Known issues
AU BAS Bulk XML Filing Limitation
: Bulk XML submissions for AU BAS are not yet available. This release supports only individual XML submissions with improved progress tracking. Bulk missions will be added in a future update.Content template versions:
VAT3AE17_6_170_TPL.XML
VAT3AEGRP17_6_124_TPL.XML
VAT3AU11_10_373_TPL.xml
VAT3AUGRP11_10_250_TPL.xml
VAT3BG13_7_170_TPL.XML
VAT3BGGRP13_7_65_TPL.XML
VAT3EG2602_3_38_TPL.XML
VAT3EGGRP2602_3_27_TPL.XML
VAT3ES15_11_556_TPL.xml
VAT3ESANN15_11_210_TPL.xml
VAT3ESANNGRP15_11_204_TPL.xml
VAT3ESGRP15_11_384_TPL.xml
VAT3FR15_10_276_TPL.xml
VAT3FRGRP15_10_211_TPL.xml
VAT3RO16_7_558_TPL.XML
VAT3ROGRP16_7_346_TPL.XML
VAT3SI16_4_201_TPL.XML
VAT3SIGRP16_4_164_TPL.XML
VAT3SK16_8_329_TPL.xml
VAT3SKGRP16_8_252_TPL.xml
VAT3TR11_11_264_TPL.XML
VAT3TRGRP11_11_190_TPL.XML
VAT3UK16_12_316_TPL.XML
VAT3UKGRP16_12_213_TPL.XML
VAT3VN11_4_34_TPL.xml
VAT3VNGRP11_4_25_TPL.xml
VAT3IEANN14_9_125_TPL.xml
VAT3IEANNGRP14_9_81_TPL.xml