How-to · Tax
ITR-U updated return: the 48-month window and what it cannot do
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) lets you file or correct a return up to 48 months from the end of the relevant assessment year. Finance Act 2025 extended that window from 24 months, from AY 2026-27. You pay the tax, the interest, and an additional tax that steps up the later you file. ITR-U cannot create a refund, enlarge a loss, or reduce tax already assessed. Confirm eligibility and the additional-tax rate on the official updated-return page before you pay.
What an updated return is
ITR-U is not another ITR-1. It is the wrapper prescribed for an updated return under section 139(8A). 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.
The 48-month window
Until Finance Act 2025 the window was 24 months from the end of the relevant assessment year. From AY 2026-27 it is 48 months. The official updated-return page and the notified ITR-U heading both use that longer period. Time is counted from 31 March 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.
Additional tax, and why it is not a late fee
Additional tax sits in section 140B. It is a percentage of the aggregate of tax and interest on the updated income. 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.
Who cannot file ITR-U
The first, second, third and fourth provisos to section 139(8A) are the eligibility test. 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.
ITR-U versus belated and revised
People reach for ITR-U in August because they missed 31 July. That is usually the wrong form. For AY 2026-27 the belated and revised window still runs to 31 December 2026. ITR-U is what remains after that date, or when you need to put more income on a year the ordinary return will no longer touch.
| 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 to confirm on official pages
- 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 Complied AI fits
The 48-month rule is in the Act. What still moves is the notified ITR-U, 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?
Finance Act 2025 extended the section 139(8A) window to 48 months from the end of the relevant assessment year, from AY 2026-27. For AY 2026-27 that runs to 31 March 2031, unless a bar in the provisos applies 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 be eligible under the provisos, and you still pay tax, interest and additional tax on the updated income.
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 not allowed. ITR-U is a voluntary disclosure that pays more, not a second chance at a claim you missed.
Is additional tax the same as the section 234F late fee?
No. Late fee under 234F 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. The ITR-U utility shows the figure for your time bucket. Read that figure before you pay.
Publication method
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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