My refund is gigantic due to the premium tax credit. Will I have to pay it back next year?

I was going to have to pay close to $500 federally, but then I entered information for form 1095-A, and it raised my refund all the way to 16,000 because my income is so low, I qualify for a huge PTC. I am unclear about what would be considered “excess” and what I would have to pay back.