Incorrect Calculation of Health Premium Tax Credit in TurboTax

In November 2021 I used HealthCare.Gov to sign up for Health Insurance in 2022 and I was told I was eligible for a premium tax credit of $4308 ($359/month) based on my estimated income for 2022.  I only under estimated my income by $19 since I forgot to include interest earnings so my estimate was quite accurate to what my 2022 AGI really is (I am a retiree with consistent monthly income).  When I entered the Form 1095-A data in TurboTax it took away my $4308 premium tax credit and said the credit was zero instead.  Why would the TurboTax calculations not correspond to what HealthCare-Gov is allowing for the premium tax credit?