After you file

print a paper copy of your revised tax return and the Form 1040-X you submitted.

 

To amend again you have to cancel amend No.1 and delete the 1040-X so that your revised return becomes your "originally filed" return.

Then start AMEND and make the second change.

 

It's not clear how many e-Files of Form 1040-X are supported by TurboTax.

 

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