How to amend 2020 taxes for Covid 19 IRA distribution; full repayment in 2022.

We took a $80k Covid-19 IRA distribution in ty2020 and divided it over 3 years and repaid $10k before filing for 2020. Now, in early 2022 we have repaid the entire amount (the additional $70k).  Now I need to Amend my 2020 taxes to show that repayment. My intention is to show a $30k repayment in 2020, a $20k repayment in 2021, and a $30 repayment in 2022. The only way I can find to change the repayment information (from $10k to $30k) is to delete the Form 8915-E and reenter the "amount rolled over to another (or back to the same) retirement account" in the step-by-step dialogue. Is this correct? Or is there another way to amend this value?