How can I straighten this out somehow child support got my second stimulus check and was not supposed to only the first one

I need TurboTax to tell i r s that it was stimulus money I was told to file 1800 of the stimulus money to be able to receive the stimulus and it backfired and that's all that I filed on because I hadn't worked do to back surgery my better half found her stimulus money through TurboTax and got it with no problems