How much Stimulus did you get? Did you have an amount on your 2020 1040 line 30? Line 30 should be for the first 2 Stimulus payments if you didn't get them or qualify for more. You don't have to file 2018 or 2019 to get the missing stimulus. You claim it on your 2020 return.
The 1st round was 1,200 (2,400 married) and 500 for each dependent under 17.
The 2nd round was 600 per person.
