Deductions & credits

Ok, so I am confused again. I did my taxes, everything was looking correct. TT asked about the 3rd Stimulus. We did receive a check back in March for $2800. We told TT we received this. TT then adjusts how much we owe to Federal +2800. So I must be missing how this all works. If I say we got the money, we have to pay that back exactly on top of what we already owe?