I'm sorry, but once you've e-filed your return, there's no getting it back.
The IRS isn't opening filing season until February 12. After that point, you should be watching your email for a notification from TurboTax about whether your return has been accepted or rejected by the IRS. IF, by chance, the IRS rejects your return, you can then add the 1099-INT (and make other corrections) before re-submitting your return.
If, however, the IRS accepts the return as filed, you'll need to amend your return. Typically, it's the end of February before TurboTax has the software ready for amending a return. I'm linking the TurboTax FAQ below that explains how to amend a return. Please follow the instructions carefully, as they are quite specific.
Additionally, an amended return cannot be e-filed. It must be printed, signed and mailed to the IRS.
How do I amend my 2020 TurboTax Online 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.***
