After you file

@Lovelyolga - please look at line 30 of Form 1040 for both your 2020 and 2021 tax return.  if you did not receive a stimulus payment that you were eligible for, the IRS should have credited you for the missing stimulus payment on this line of your tax return.  

 

The 2020 tax return is where any of the first two missing stimulus payments would have been cr editied.  The 2021 tax return is where the 3rd stimulus payment (if missing) would have been credited.