Form 1040X only requires that you update numbers ... TurboTax Tip: You must amend a return within three years of the original filing deadline, or within two years of paying the tax for that ...

If you want to amend, you must file a Form 1040X within three years from the date you filed your original return, or within two years from the date you paid the tax, whichever is later.

How do I amend my federal tax return? Form 1040X is used to amend a previously filed federal income tax return. Check the box at the top of the form that indicates which year you're changing. Because ...