Yes, you will need to amend your 2020 tax return to report the 2020 excess contribution plus earnings removed in 2021. You do not need to enter the 1099-R on your 2021 tax return.
The IRS states:
How to treat withdrawn interest or other income.
You must include in your gross income the interest or other income that was earned on the excess contribution. Report it on your return for the year in which the excess contribution was made.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"