After you file

TurboTax does not know what amount you paid with your original return. You need to manually enter the amount that you paid ($3,176) so TurboTax could calculate the refund amount.

• Go through the TurboTax amended return and enter the amount paid with the original return of $3,176. See Form 1040X line 16, Total amount paid with request for extension of time to file, tax paid with orig...

Keep in mind: You have 3 years from the date you filed your return or 2 years after you paid the tax due (whichever is later) to file an amendment.