From the healthcare.gov site as of 3/31/21:
"Q. What happens if my income changes and my premium subsidy is too big? Will I have to repay it?
A. For the 2020 plan year, the answer is no. This is due to the American Rescue Plan (ARP), which was signed into law by President Biden in March 2021. The ARP provides a one-time relief from excess premium subsidy repayments, but it’s only for the 2020 plan year."
