@robert woida , please clarify your question so that we can assist you. If your question is about not receiving the first and second stimulus check, then you cannot claim that on the 2021 Tax Return. You will have to file the 2020 Tax Return if you have not already filed or you will have to amend the 2020 Tax Return if you have already filed and forgot to include it.
To amend the return please visit, How to amend (change or correct) a return you've already filed for instructions on how to amend the 2020 Tax Return
Please visit File your 2020 taxes if you need to file your 2020 Tax Return.
