Can I revise my income tax return if I find a mistake after filing?

Yes. If you find an omission or wrong statement in a return you have already filed, you can file a revised return. It is generally allowed up to 31 December of the relevant assessment year, or before the assessment is completed, whichever is earlier.

A revised return replaces the original one, so it must contain all the correct details, not only the changed items. If the time for a revised return has passed, an updated return may be available subject to conditions and additional tax. Confirm which option suits you with your CA or tax advisor.