I had the same issue using TT 2021 online version. It was incorrectly putting in a repayment limitation of $2700 even though my income was over the 400% poverty level. As of eve of 2/2/21 it seems to have been corrected and it showed the full amount of repayment of APTC on my form. I was able to submit the tax return and it was accepted by the IRS a few minutes later.
