If you have no supporting compensation, you'll need to obtain a return of contribution, not a regular distribution, of the $100 excess contribution that you've made for 2021. If done in 2021 you'll receive a code 8J From 1099-R (easier to deal with than a code PJ 2022 Form 1099-R that you would eventually receive if you waited until 2022 to obtain the return of this contribution).
