If you did not receive the 1st and/or 2nd stimulus check you can get it by filing a 2020 tax return and using the recovery rebate credit in Federal Review. It will end up on line 30 of a 2020 tax return and will be added to your refund (or reduce your tax due).
If you have already filed a 2020 return you must amend it for the credit on line 30.
