After you file

Thank you for your reply!

I neglected to mention that I am using TurboTax CD/Download software on Windows.

The link @MonikaK1  provided appears to be for the online version, but that link also provides a link to the instructions that I believe are intended.

• How do I cancel or undo an amended return in the TurboTax CD/Download software?

Question: Is there any reason I cannot instead simply use the file that I backed up after my returns had been accepted?

As indicated in the image below, I have a copy that was saved 3/20/2023 when the return was accepted, and long before I started attempting to amend.

 3/20/2023 timestamp on tax file when accepted