Get your taxes done using TurboTax

I understand that what my 3rd stimulus ck is based on my 2019 return ( I haven’t  filed my 2020 return when the check was issued) and not my 2021 return .  
TurboTax calculated my third check based on my AGI of $155k in 2021to be $1344 married filing jointly. We received $2800. According  to TurboTax, my tax owed jumped from $904 to $2248 (the same $1344 they calculated!!)

WHY??  I can’t file yet until I get this straightened out.  
There is no chargeback on a stimulus ck issued on a 2019 return (<$150k AGI) verses my 2021 return based on $155k). 
HELP!