Savings credit married filing jointly error

My Retirement Savings Credit is only giving me a $1000 credit while still saying I owe $291.  I am married filing jointly, and our income is under the $39,500 threshold for 50% credit on contributions.  I contributed $4,708 to my 401k in 2021, which should qualify for the married filing jointly maximum of $2,000 (or at least up to the amount of federal tax I am liable for in 2021), but turbotax is only giving me the $1,000 credit.