How to File a Revised ITR: Complete Guide to Correcting Your Tax Return for AY 2026-27

You hit submit on your ITR, breathed a sigh of relief — and then noticed something wrong. Maybe you forgot to include interest income from a savings account you barely use. Maybe a fresh AIS update revealed a mutual fund redemption you missed. Maybe you claimed a deduction under the wrong section.

The good news: the Income Tax Department actually expects this. That's exactly why Section 139(5) exists, allowing you to file a revised return to correct mistakes in your original ITR. This guide walks you through when you can revise, how to do it, and the pitfalls to avoid for AY 2026-27.

What Is a Revised Return?

A revised return is a corrected version of an income tax return you have already filed. Filed under Section 139(5) of the Income Tax Act, it completely replaces your original return — the tax department processes the revised version, and the original is set aside.

Importantly, the revised return inherits the original's filing date for many compliance purposes (like loss carry-forward), as long as the original was filed on time. You don't lose those benefits just because you corrected a mistake.

When Can You File a Revised Return?

You can revise your return if:

• The original ITR was filed under Section 139(1) (on or before the due date) or under Section 139(4) (belated return — yes, belated returns can also be revised since AY 2017-18).
• You discover an "omission or wrong statement" — this includes missed income, incorrect deductions, wrong personal details, wrong bank account, or selection of the wrong ITR form.
• You file the revised return within the deadline allowed under Section 139(5).

You cannot revise:

• A return that was filed in response to a notice under Section 142(1) or 148.
• A return that has already been processed and where the assessment is complete (some restrictions apply once a 143(3) scrutiny assessment is made).

Deadline to File a Revised Return for AY 2026-27

For AY 2026-27 (financial year 2025-26), you can file a revised return until:

December 31, 2026 — or before the completion of assessment, whichever is earlier.

This is the same deadline that applies to belated returns. So practically speaking, you have about five months after the original July 31 due date to spot and correct any mistakes.

The fourth row is worth flagging: if you miss the December 31 revised return window, you may still be able to file an updated return (ITR-U) under Section 139(8A) — but this comes with additional tax (25% to 70% extra) and is meant for declaring missed income, not for claiming refunds or reducing tax liability. So it's not a real substitute for a timely revised return.

How Many Times Can You Revise?

There is no limit on the number of revisions you can make, as long as each one is filed before the December 31 deadline. If you file a revised return and then notice another error, you can revise again. Each revision replaces the previous one.

That said, multiple revisions can flag your return for closer scrutiny. Try to file once you're confident you've caught everything — pull your AIS, TIS, Form 26AS, bank statements, and broker statements together first.

Common Reasons People File Revised Returns

After processing thousands of returns, the same handful of mistakes show up again and again:

1. Missed interest income — savings account, FD, recurring deposit, or bond interest that wasn't reported. AIS now catches almost all of this.
2. Missed capital gains — a small mutual fund redemption, a stock sale, or a property transaction that was overlooked.
3. Wrong ITR form — someone with capital gains from stocks accidentally filed ITR-1 instead of ITR-2. The portal may flag this as defective.
4. Forgot to claim a deduction — Section 80D health insurance, 80E education loan interest, or NPS contributions under 80CCD(1B) that weren't entered.
5. Wrong tax regime — clicked the new regime when the old regime would have been better, or vice versa.
6. Bank account error — incorrect IFSC, wrong account number, or selected an account where refund cannot be credited.
7. Form 16 mismatch — employer issued a corrected Form 16 after you filed.
8. Foreign assets disclosure missed — RSUs, foreign stocks, or overseas bank accounts not reported in Schedule FA (a serious omission with heavy penalties under the Black Money Act if left unfixed).

Step-by-Step: How to File a Revised Return

The process is essentially the same as filing your original return, with two key differences — you select a different filing section and reference the original return's acknowledgement number.

Step 1: Gather your original return data

Before you start, download a copy of the ITR you originally filed. You'll need the acknowledgement number and the date of filing of the original return. Both are in the ITR-V or in your e-filing portal under "View Filed Returns."

Step 2: Log in to the income tax e-filing portal

Go to incometax.gov.in and log in. Navigate to e-File > Income Tax Returns > File Income Tax Return.

Step 3: Choose the assessment year

Select AY 2026-27 (since you're correcting FY 2025-26 income). Then choose the online mode for ITR-1 and ITR-2, or the offline mode if you're using a JSON utility.

Step 4: Select "Revised Return" under filing section

This is the critical part. Under "Filing Section," choose:

Revised return under Section 139(5)

The portal will then ask for:

• The original return's acknowledgement number (15 digits)
• The date of filing of the original return

Enter both carefully. A typo here is the most common reason a revised return gets rejected.

Step 5: Make your corrections

The portal will pre-fill data from your original return. Don't just review — overwrite the incorrect entries with the corrected values. Double-check every section, not just the one you're "fixing." Once you submit a revised return, it fully replaces the original, so any earlier-correct fields you accidentally erase will be erased in the final return too.

Step 6: Recompute tax and pay any shortfall

If your revision results in additional tax payable (because you reported missed income), pay it through the e-filing portal before submitting. Use Challan 280 with the assessment year as 2026-27. The portal will reflect the payment in your prepaid taxes.

If your revision results in a higher refund, no extra payment is needed — the department will recompute and credit the difference.

Step 7: Verify the revised return

Like any ITR, your revised return must be e-verified within 30 days of submission. The fastest way is Aadhaar OTP. You can also use net banking, demat account, or a bank account EVC. An unverified revised return is treated as not filed at all — and your original return remains in force.

Will You Pay Interest or Penalty on the Revised Amount?

Here's where things get nuanced.

Interest under Section 234B and 234C — these apply on shortfall in advance tax payments. If your revision shows you owed more tax than you paid through advance tax / TDS, interest applies regardless of whether you revise or not. You're not penalized for revising; you're paying interest on the underpayment.

Penalty under Section 270A (under-reporting / mis-reporting) — this is the bigger concern. If the tax department later notices the discrepancy and you hadn't revised, the penalty can be 50% of the tax on under-reported income (or 200% for mis-reported income). Filing a revised return before the department flags it almost always avoids this penalty.

Section 234F late filing fee — this only applies if your original return was belated. A revision of an on-time return doesn't attract this fee.

In practice: if you spot a mistake, revise quickly. The interest cost on a small underreported amount is minor compared to a 50% penalty if it surfaces in a notice later.

Special Case: Switching Tax Regimes via Revised Return

A common question — "I picked the wrong regime; can I switch via revised return?"

For salaried individuals filing ITR-1 or ITR-2, yes, you can switch tax regimes through a revised return, as long as the original was filed on or before the July 31 due date. If your original was a belated return (filed after July 31), the new tax regime is your default and you generally cannot opt out via revision.

This makes regime selection at original filing matter a lot. If you're not sure which regime saves more, run both calculations carefully — see our guide on old vs new tax regime comparison before submitting your original return.

Practical Examples

Example 1: Missed FD interest

Priya, a salaried professional in Pune, filed her ITR-1 in July 2026 reporting ₹14,50,000 salary income. In September, her AIS updated to show ₹38,000 interest from a fixed deposit she had forgotten about. The TDS deducted by the bank was ₹3,800.

Under the new regime, this ₹38,000 adds roughly ₹7,920 to her tax liability (at 20% slab plus 4% cess). She pays the shortfall of ₹4,120 (after credit for TDS) plus minor 234B/234C interest, files a revised return in October, and avoids any 270A penalty risk.

Example 2: Wrong ITR form

Rohan filed ITR-1 reporting only his salary, but he had ₹65,000 of long-term capital gains from selling mutual funds. ITR-1 doesn't allow capital gains beyond ₹1.25 lakh of LTCG from listed equities under Section 112A — but more importantly, he didn't report it at all.

He files a revised return using ITR-2, includes the capital gains in Schedule CG, recomputes tax, and pays any shortfall. The form change doesn't require any special procedure — just select ITR-2 and Section 139(5) when filing the revision.

How 49Tax Can Help

Our platform pulls your AIS, Form 26AS, and broker data automatically when you start a return — so common omissions like missed FD interest or stock transactions are flagged before you submit, not after. If you do need to revise, 49Tax remembers your original filing details and pre-fills the Section 139(5) section so you don't fumble with acknowledgement numbers.

Key Takeaway

A revised return is a tool, not a red flag. The Income Tax Department designed Section 139(5) precisely because mistakes happen — and revising proactively almost always works in your favour compared to ignoring an error and waiting for a notice. If you've spotted something wrong with your AY 2026-27 return, you have until December 31, 2026 to fix it. Don't wait until the last week, and run a final reconciliation against your AIS before submitting the revision so you don't end up revising twice.

For a broader pre-filing check, see our last-minute ITR filing checklist to catch issues before they become revisions.