How long is the ITR-U window under section 139(8A)?
How an updated return under section 139(8A) works after Finance Act 2025: the 48-month window from the end of the assessment year, additional tax, who is barred, and how ITR-U differs from a belated or revised return.
In this guide
An updated return under section 139(8A) can be filed up to 48 months from the end of the relevant assessment year, a window Finance Act 2025 extended from 24 months with effect from AY 2026-27. Filing ITR-U costs the tax, the interest, and additional tax under section 140B that steps up by time bucket. ITR-U cannot create a refund, enlarge a loss, or reduce assessed tax.
What is an updated return in ITR-U?
ITR-U is the wrapper prescribed for an updated return under section 139(8A), not another ITR-1. Inside it you still pick the ordinary form, ITR-1 to ITR-7, that matches the year you are updating. The wrapper is what tells the department you are using the 48-month window, and what computes the additional tax.
You can use it if you never filed, or if you already filed original, belated or revised and now need to put more income on the record. The official page is explicit: the form is for updating income or reducing a loss. It is not a second refund claim.
When does the ITR-U 48-month window close?
The ITR-U window closes 48 months after 31 March of the relevant assessment year, so for AY 2026-27 it runs to 31 March 2031. Until Finance Act 2025 the window was 24 months; the official updated-return page and the notified ITR-U heading both now use the longer period. Time is counted from the end of the assessment year, not from the day you missed the original due date.
The form asks which bucket you are in: within 12 months, 12 to 24 months, 24 to 36 months, or 36 to 48 months from the end of the assessment year. That bucket is what drives additional tax. Pick the bucket that matches the date you actually upload, not the date you first opened the utility.
| When you file ITR-U | What the form asks you to mark |
|---|---|
| Within 12 months of 31 March of the AY | The first additional-tax slab |
| After 12 months and up to 24 months | The second slab |
| After 24 months and up to 36 months | The third slab |
| After 36 months and up to 48 months | The fourth slab, with a tighter notice bar |
For AY 2026-27 the 48 months run to 31 March 2031. A search, a 148A notice in the last year of the window, or a completed assessment can close it earlier. The date on a blog is not a promise.
What is additional tax under section 140B?
Additional tax under section 140B is a percentage of the aggregate of tax and interest on the updated income, charged on top of both and rising with the time bucket you file in. The official page still describes the original 25 per cent and 50 per cent slabs. Finance Act 2025 added higher percentages for the third and fourth years. Do not type a rate from memory into a working paper. Let the ITR-U utility compute it for the bucket you marked, then read that figure against the official page before you pay.
This charge is separate from interest and from the section 234F late fee that applies to a belated return inside the ordinary window. Paying additional tax does not cancel interest. It is the price of using the long window.
Tax and additional tax have to be paid before the updated return is treated as furnished. An ITR-U uploaded without that payment is not a completed filing.
Does paying additional tax cancel interest?
No. Additional tax under section 140B is charged on top of interest, not instead of it, because the section computes it as a percentage of the tax and interest together. Interest under sections 234A, 234B and 234C still runs on the updated income for the year being updated.
Who cannot file ITR-U?
A taxpayer cannot file ITR-U where the updated figures would reduce tax, create a refund or enlarge a loss, or where a search, prosecution, completed assessment or a late-window 148A notice applies. The provisos to section 139(8A) are the eligibility test, and the form asks you to confirm them. Typical bars:
- The updated figures would reduce tax, increase a refund, or enlarge a loss.
- A search, requisition, or a survey of the kind the proviso names has already taken place for that year.
- A prosecution has been initiated under the Chapter XXII offences the section lists.
- Assessment, reassessment, or recomputation for that year is already completed.
- In the last twelve months of the 48-month window, a notice under section 148A has been issued, unless an order is passed that no notice under section 148 will be issued.
The last bar is new with the longer window. If you are in months 37 to 48, check 148A before you pay additional tax. The utility will not always stop you at login.
Is ITR-U different from a belated return?
Yes. A belated return under section 139(4) or a revision under section 139(5) can be filed up to 31 December of the assessment year and may still produce a refund; ITR-U under section 139(8A) opens after that date, runs 48 months, and cannot produce a refund. People reach for ITR-U in August because they missed 31 July, and that is usually the wrong form. See the ITR filing last date guide for the ordinary window.
| Belated or revised | Updated return (ITR-U) | |
|---|---|---|
| Sections | 139(4) or 139(5) | 139(8A), with tax under 140B |
| Usual close for AY 2026-27 | 31 December 2026 | 48 months from 31 March 2027 |
| Extra money | Late fee and interest, where they apply | Tax, interest, and additional tax |
| Refund or larger loss | Possible, if the figures support it | Not allowed |
You also cannot use ITR-U only to add Schedule FA or Schedule AL when the income itself does not change. The official guidance is that the form updates income or reduces a loss. A missed foreign asset line with no income effect is a different problem.
How do I check the ITR-U rules officially?
Check the ITR-U rules against the department's own updated-return page, the notification that prescribes the form, and the text of sections 139(8A) and 140B. Three steps close the loop.
- Read the official updated-return page. That page is the department's own explanation of the 48-month window and of additional tax.
- Open Notification No. 52/2026 and match the ITR-U heading. The heading is who the form is for.
- Confirm sections 139(8A) and 140B on India Code, then file only through the e-Filing portal.
If 31 December is still open, go back to belated versus revised. ITR-U is the more expensive door, and it only opens one way.
Where are ITR-U form changes notified?
ITR-U form changes are notified by CBDT, as Notification No. 52/2026 did for the current form. The 48-month rule sits in the Act; what still moves is the notified form, a validation change, or a circular on how additional tax is computed. CBDT updates on Complied AI keep those documents in one feed so you can open the source rather than a rate table someone forwarded.
Practical checks
Common questions
How long can I file an updated return after AY 2026-27?
The section 139(8A) window is 48 months from the end of the relevant assessment year, extended from 24 months by Finance Act 2025 with effect from AY 2026-27. For AY 2026-27 that runs to 31 March 2031, unless a bar in the provisos closes it earlier. Confirm the window on the official updated-return page for the year you are updating.
Can I file ITR-U if I never filed an original return?
Yes. Section 139(8A) allows an updated return whether or not a return was furnished under section 139(1), 139(4) or 139(5). You still have to clear the provisos to that section, and you still pay tax, interest and additional tax under section 140B on the updated income before the return counts as furnished.
Can ITR-U be used to claim a missed refund?
No. An updated return that results in a refund, reduces the tax liability, or increases a loss is barred by the provisos to section 139(8A). ITR-U is a voluntary disclosure that pays more tax, not a second chance at a deduction or a TDS credit you missed in the original return.
Is additional tax the same as the section 234F late fee?
No. The section 234F late fee of Rs 5,000, or Rs 1,000 below Rs 5 lakh income, applies to a belated return inside the ordinary window. Additional tax on ITR-U is a separate charge under section 140B, computed as a percentage of the tax and interest on the updated income and stepped by time bucket. Read the utility figure before you pay.
I forgot some freelance income two years ago. Is ITR-U the right form?
Yes, ITR-U is the right form once 31 December of that assessment year has passed. Missed freelance income increases the tax payable, which is exactly what section 139(8A) is for. You file ITR-U with the ordinary form for that year inside it, mark the 24-to-36-month bucket if that is where the upload date falls, and pay tax, interest and additional tax under section 140B.
Do I have to pay before uploading ITR-U?
Yes. Tax, interest and additional tax under section 140B must be paid before an updated return is treated as furnished, so an ITR-U uploaded without the challan is not a completed filing. Generate the challan first, then enter its details in the form, rather than uploading and paying afterwards.
A 148A notice landed on the year I want to update. Can I still file?
Usually not, in the final twelve months. Where a notice under section 148A is issued in the last twelve months of the 48-month window, the proviso to section 139(8A) bars an updated return for that assessment year, unless an order is passed that no notice under section 148 will be issued. Check the notice status before paying additional tax.
Can I file ITR-U just to add a missed foreign asset?
No, not where the income does not change. Section 139(8A) permits an updated return to update income or reduce a loss, so adding Schedule FA or Schedule AL with no effect on the tax payable is outside its scope. A missed foreign-asset disclosure with no income effect is a separate problem from an updated return.
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How this guide was prepared
This guide is published by the Complied AI research desk. Its source list and stated position were checked against the official records shown below on 14 August 2026.
Automation, including AI, may assist research, drafting and structure. It does not replace the official record or amount to an independent professional review. Read our editorial standards and corrections policy.
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