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1120 electronic filing dates and deadlines
Review key dates, deadlines, and grace periods for filing 1120 corporate returns and extensions electronically.
Review IRS Publication 4163, Modernized e-File (MeF) Information for Authorized IRS e-file Providers for Business Returns, for filing deadlines and other information related to 1120 electronic filing.
The MeF System is available daily, except during maintenance and down times. Check the IRS Modernized e-File (MeF) status page for maintenance schedules.
note
All deadlines are 11:59:59 pm local time based on the preparer's location. Thomson Reuters time-stamps e-files when it receives them. We recommend you transmit electronic files to Thomson Reuters at least 1 hour before the filing deadline.
Date | Event |
|---|---|
January 13, 2026 | The IRS begins accepting 1120 electronic tax returns. The IRS doesn't set a final date for transmitting electronic 1120 returns. You can continue to use 2024 and 2023 UltraTax CS and the IRS Modernized e-File (MeF) program to file returns that require 2024 and 2023 federal forms. |
March 16, 2026 | Due date for timely filed calendar-year-end S Corporate returns and Form 7004 extensions for S Corporations. note
You have 10 calendar days after you transmit a corporate electronic return to receive approval on a rejected return. You have 5 calendar days after you transmit a 7004 extension electronic file to receive approval on a rejected extension. |
April 15, 2026 | Due date for timely filed calendar-year-end C, F, and POL Corporate returns, Form 7004 extensions for C, F, and POL Corporations, and Form 114, Report of Foreign Bank Accounts (FBAR) to FinCEN. note
You have 10 calendar days after you transmit a corporate electronic return to receive approval on a rejected return. You have 5 calendar days after you transmit a 7004 extension electronic file to receive approval on a rejected extension. This grace period doesn't apply to Form 114, Report of Foreign Bank Accounts (FBAR). |
September 15, 2026 | Due date for transmission of June 30 year-end C and F Corporate returns, Form 7004 extensions for June 30 year-end C and F Corporations, and calendar-year S Corporate returns on extension. note
You have 10 calendar days after you transmit a corporate electronic return to receive approval on a rejected return. |
October 15, 2026 | Due date for transmission of calendar-year electronic C, F, and POL Corporate returns and Form 114, Report of Foreign Bank Accounts (FBAR) to FinCEN on extension. note
You have 10 calendar days after you transmit a corporate electronic return to receive approval on a rejected return. This grace period doesn't apply to Form 114, Report of Foreign Bank Accounts (FBAR). |
For more information about electronic filing deadlines, see the Product News section of the UltraTax CS homepage.
Fiscal-year deadlines
- C and F Corporate returns with fiscal tax year-ends other than June 30 are due on the 15th day of the 4th month after the end of the tax year.
- Form 7004 extensions for C and F Corporate returns with fiscal tax year-ends other than June 30 are due 6 months from the original due date.
- Form 7004 extensions for POL Corporate returns with fiscal tax year-ends are due 6 months from the original due date.
Grace period for rejected returns
The IRS considers electronic returns that you re-file during the grace period as timely filed returns.
The grace period begins when the IRS rejects the return and is never extended for weekends, holidays, or end-of-year cutoff.
The grace period doesn't apply to payments. When the IRS rejects a return on the due date, remove the date in the
Requested payment date
field in the ELF screen before you resubmit the return or extension. You need to remit the payment through the Electronic Federal Tax Payment System (EFTPS). Refer to IRS Publication 4163 for more information.