Revised Income Tax Return 2026: Section 139(5) Deadline, Process, and How Many Times You Can Revise (AY 2026-27)

By Nitish Bharadwaj · Published Aug 19, 2026 · 6 min

Section 139(5) lets you correct an error in an already-filed return — original or belated — by filing a revised return that replaces it entirely, at no extra cost and with no cap on how many times you can do it. The deadline is fixed at three months before the assessment year ends: December 31, 2026 for AY 2026-27, or earlier if your assessment is already completed. This guide covers that deadline, what you need before you start, and how a revised return differs from a belated return and an updated return (ITR-U).

Filing your ITR doesn't have to be the final word on it. Section 139(5) lets you go back and correct an error — a missed 26AS entry, a wrong bank account for your refund, a deduction you forgot to claim — by filing a revised return that completely replaces the one you already submitted. It's a different mechanism from a belated return and from an updated return (ITR-U), and mixing the three up is the easiest way to miss the actual deadline that applies to you.

What a Revised Return Actually Does

A revised return doesn't get filed alongside your original — it replaces it entirely. Once processed, the department treats the revised version as your only return for that year; the original stops mattering for every purpose, from refund calculation to scrutiny. This applies whether your original return was filed on time or was itself a belated return — both are eligible to be revised under Section 139(5).

The Deadline: Three Months Before the Assessment Year Ends

A revised return can be filed any time up to three months before the end of the relevant assessment year, or before your assessment is completed by the department, whichever comes first. For AY 2026-27 — the return most salaried taxpayers filed or will file by July 31, 2026, covering FY 2025-26 income — that assessment year ends March 31, 2027, which puts the revision deadline at December 31, 2026. If the department completes your assessment before that date, your window to revise closes at that point instead.

Our belated return and ITR-U guide covers those two routes in full — the short version is that a revised return is the free, no-penalty option, and it's only available while this earlier window is still open.

No Limit on How Many Times You Can Revise

There's no cap on the number of times a return can be revised within the deadline. If your revised return itself turns out to have an error, you can revise it again — each new revision simply replaces the one before it. In practice, revising more than once invites more scrutiny than it saves, so it's worth getting the correction fully right the first time rather than treating the window as a series of drafts.

What You Need Before You Start

• The acknowledgment number and filing date of the original return — the portal asks for both when you select the revised filing type.
• On the income tax e-filing portal, choose 'Revised u/s 139(5)' as the return filing section, not 'Original' — selecting the wrong option can cause processing delays.
• The complete return, refiled from scratch — a revision replaces the whole return, so you can't submit just the corrected schedule on its own.
• E-verification completed within 30 days of filing the revised return, exactly as with any other return — an unverified return is treated as not filed at all.

What a Revision Cannot Undo

Once your assessment is completed under Section 143(3), the window to revise closes permanently, regardless of whether you're still inside the three-month cutoff. A revision also doesn't reverse a refund already credited or a demand already raised against your original return — you may still need to respond to that outcome separately, even after the revised return is processed and accepted.

A Common Case: Interest Income Missed at the Time of Filing

The most frequent reason ordinary salaried taxpayers end up revising isn't a mistake they made — it's information that wasn't visible yet when they filed. A bank reports FD interest to the department slightly after the fact, and by the time it shows up on your Annual Information Statement, you may have already filed and left it out. Reconciling your return against Form 26AS and AIS after filing — not just before — is worth doing precisely to catch this kind of gap while the revision window is still open.

None of this changes for the return you're filing this cycle because of the incoming Income Tax Act, 2025 — that law governs income earned from April 1, 2026 onward, and your current AY 2026-27 filing stays entirely under the existing Section 139(5) framework described here. And once your revised return is filed, keep an eye on the same e-verification deadline and refund tracking process that apply to any other return — a revision doesn't reset or simplify those separately.