How to fix a tax return mistake after getting a refund

You filed your income tax return, got the refund, and then spotted the error. Maybe you missed reporting a capital gain, claimed a deduction you did not qualify for, or picked the wrong ITR form. The tax department has already processed the return and sent you money. Can you still fix it?

The answer is yes. Section 139(5) of the Income Tax Act lets taxpayers file a revised return even after the original has been processed and a refund issued. The key constraint is the deadline: you have until March 31 of the next financial year to make corrections. For the 2025-26 assessment year, that means any revised return must be filed by March 31, 2027.

This window is wider than it used to be. Earlier, the cutoff was December 31 of the assessment year or before the department completed its assessment, whichever came first. The extension gives taxpayers more breathing room to catch mistakes after the fact.

Who can file a revised return

Any taxpayer who filed an original return – whether on time or as a belated return – is eligible. There is no penalty for filing a revision itself. The tax department does not charge a fee simply for correcting an error.

There is a catch. If the original return was filed after the due date, the belated return already attracted a late fee under Section 234F. That fee stands at ₹5,000 for most taxpayers, reduced to ₹1,000 for those with total income below ₹5 lakh. Filing a revised return does not waive that penalty.

What happens if the correction increases your tax bill

A revised return replaces the original entirely. If the corrected numbers show a higher tax liability, you will need to pay the difference. The department will adjust any excess refund already issued against the new demand. Interest under Section 234A, 234B, or 234C may apply if the additional tax was due earlier.

If the revision reduces your tax liability or increases your refund, the department processes the difference after verifying the revised return.