First, since it was returned to you, remove it form the TurboTax contribution interview as if you never entered it.
Second, if there were earnings then that will be 2020 taxable income that will be reported on a 2021 1099-R that you will receive next January.
Wait for the 1099-R. If box 2a is zero, which it will probably be, then there will be nothing more to do.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
