Since you have already submitted your 2020 tax return electronically, you will have to wait until your tax return was either accepted or rejected.
- If your e-filed return is still pending. Wait until the return is accepted before amending
- If your return has already been accepted. You will need to amend your tax return.
- If rejected, just make your changes and then resubmit or mail your return.
Please refer to: TurboTax: Do I Need to Amend
