Do not file an amended return. There is nothing that you have to fix. The American Rescue Plan Act suspended the requirement to repay excess Advance Premium Tax Credit for 2020. The IRS will recalculate your tax return and send you the additional refund. (It's an additional income tax refund, not a stimulus check.) It might take several months to get the refund. See the following IRS news release for more information.
IRS suspends requirement to repay excess advance payments of the 2020 Premium Tax Credit
