After you file

This is for the 2021 March 17 payment. 

On my 2020 tax return it is marked 1 daughter as a dependent and my older daughter who is 23 is marked as no longer a dependent. 
So should be Me, My wife, and our disabled daughter. 
We received a 5600 payment and that is what the IRS website shows. 

so no idea why we received that much