Other financial discussions

I did not file a full return. I filed because I did not file last year and wanted to update my direct deposit information in order to get the stimulus money. I did get the stimulus, but I did not have any income therefore I was not required to file, nor did I use my dependent to claim the child tax credit, or a child deduction, or eic. So I am not sure why this stimulus registration would be preventing someone from claiming her on this year's return.