@Newaccountant
"created a new 2020 tax return from scratch."
Is this new tax return your correct tax return.?
compare the original return and the correct return and enter the differences on Form 1040-X.
It's pretty straight-forward.
The blank form in fillable PDF format and its instructions are available at www.irs.gov.
Refer to the Instructions for what is to be attached to Form 1040-X.
Do not include your old 1040 nor your revised 1040 because the Form 1040-X reflects any changes there and becomes your new tax return.
Mail to the address shown in the Instructions.
You will have to mail it because you did not e-File 1040 with TurboTax.
