Paying Back Covid IRA Distribution

I took out a Covid distribution from my SEP IRA at the end of 2020 and elected to divide the tax liability over tax years 2020, 2021, and 2022. I just paid back 100% of this distribution (in March of 2022) and now would like to amend my 2020 tax return to get back the federal and state taxes that I paid, as well as to avoid getting taxed on this distribution when I file my 2021 taxes. My IRA is with Fidelity, who told me that they won't be able to produce a form which indicates that I paid this distribution back until early 2023, because "the IRS hasn't yet produced the necessary form for them to send to me." My question is, do I even need a form from Fidelity to amend and refile my 2020 tax return, or can I just adjust my response on the 2020 8915 form to indicate that I have repaid this distribution? Also, can I avoid paying the tax on my 2021 return, once I have amended my 2020 return and import the results into 2021 Turbotax?