Retirement tax questions

Dave,

a question on this topic.  I took a Cares Act withdrawl from my 401K in 2020.  Didn't receive the tax form in the mail and thus forgot to report it on that return.  I didn't discover the oversight until early 2022 and repaid the distribution in full to my 401K in June 2022, but am now confused about whether I amend the 2020 return and include the repayment on the 2022 return or simply wait for the IRS to issue a letter and provide them with evidence of the repayment ie. what's the point of amending the 2020 return and paying tax on the distribution if I will receive it all back in 2022?).  Thank you.