Do I have to pay back the tax credit if I made less than 100% FPL? For example if I found out at the end of the year I didn’t make enough to get tax credits or was in the Medicaid gap?
If you made less than 100% FPL but got an advance premium tax credit (APT), the 8962 instructions explain what to do.
In short, as you complete the form and fill out each line, you'll realize your repayment amount is zero in most standard cases. Meanwhile, if you made over 100% but still would have qualified for Medicaid you still owe money back, but it is recapped by the repayment limitations table.
You have to complete the form since you got tax credits, so when you do all questions about repayment will essentially be answered for you.