You will not be able to e-file a 2021 return using TurboTax. The "Live" full service only helps with current returns for tax year 2023. The only way for you to file a 2021 return is by mail. Use a mailing service like certified mail when you send it so that you will know it was received.
If you really want to have the return e-filed, have a 2021 return prepared by a paid local tax professional who has the software that will e-file a past year return.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
