To add to my post above, if you still need to amend your return:
Where is the recovery rebate credit on TurboTax amended return?
If you're completing your tax return on your own, the credit can be claimed on line 30 of Form 1040 or Form 1040-SR. Instructions for completing this line are included in Form 1040's instructions. In particular, look for the 2020 Recovery Rebate Credit Worksheet - Line 30 to calculate your potential credit amount.
