How do I report a 1099-R distribution from 2020 for my 2021 taxes ? It was a from qualified 2020 distribution for coronavirus for total $15k and repayment over 3 yrs

In 2020 I withdraw  $15k under the 2020 Care Act  and in 2020 reported $5k, and now I want to report another $5k but not sure how to do that since I only have on 1099-R from 2020