Amend Return after Return of Excess Contribution

The IRS has already accepted my tax return for 2020. I realized I had an excess contribution to my Roth IRA in 2020 after filing the 2020 tax return. Fidelity returned my 2020 excess contribution and earnings in 2021. Fidelity said they will not issue any new tax forms until 2022. Do I file an amended return for 2020 or include the 2020 excess contribution and earnings in my 2021 tax return in 2022?