What should I do if I made a mistake on my federal return that I've already filed?
It depends on the type of mistake you made:
- Many mathematical errors are caught during the processing of the tax return and corrected by the IRS, so you may not need to correct these mistakes.
- If you didn't claim the correct filing status or you need to change your income, deductions, or credits, you should file an amended or corrected return using Form 1040-X, Amended U.S. Individual Income Tax Return.
When filing an amended or corrected return:
- Include copies of any forms and/or schedules that you're changing or didn't include with your original return.
- To avoid delays, file Form 1040-X only after you've filed your original return. Generally, for a credit or refund, you must file Form 1040-X within 3 years after the date you timely filed your original return or within 2 years after the date you paid the tax, whichever is later.
- Allow the IRS up to 16 weeks to process the amended return.