TurboTax FAQ
TurboTax FAQ
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How to amend (change or correct) a return you already filed

Select a tax year for specific amending instructions.

Keep in mind: You have 3 years from the date you filed your 2017 return (or 2 years after you paid the tax due, whichever is later) to file an amended return, which means you don't have to get it done by the April 17 filing deadline. More info