Unfortunately, TurboTax allows e-filing for Form 1040-X (amended return) for the current year. So you'll need to print, sign and mail your 2020 1040-X. Be sure to mail it using Certified Mail or another method that requires signature on receipt.
How do I amend my 2020 return?
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
