Retirement tax questions

SamS1,

 

In my situation, I took a CACW in late 2020, forgot to include it on my 2020 return.  Did not report anything on my 2021 return and repaid it fully back to my 401K in early 2022.  Do I really need to amend returns or can I simply show the IRS evidence of repayment if they chase me on the missed reporting in 2020?  If the answer is that I must amend, can I simply amend 2020 and include the reporting of the repayment on the 2022 return? (and avoid having to amend 2021).  Will I be assessed a penalty/tax based on the fact that I did not report the distribution over the 3 year period?