The amended return refers to changes made to a tax return from previous years. If you made a mistake on your tax return, you can fix it by filing an amended return.
You must complete a different Form 1040-X for every return you're amending if it spans more than one year. You must also mention any schedules or forms that the changes would affect.
You'll need to file an amended tax return if you receive information after filing your original return that significantly changes your taxable income.
You must typically file Form 1040-X within three years after filing your first return or within two years of paying the tax, whichever comes first, if you want to obtain money back.
Using the Where's My Amended Return? online tool, you can find out the status of your amended return that was filed on paper or electronically or call toll-free number 866-464-2050.