After you file

The IRS website still says this on 3/31/2021:

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We’re reviewing the tax provisions of the American Rescue Plan Act of 2021, signed into law on March 11, 2021. Taxpayers who filed a 2020 tax return and reported an excess advance premium tax credit repayment on Line 29 of Form 8962, Premium Tax Credit, should not file an amended tax return only to get a refund of this amount. The IRS will provide more details soon.

Premium Tax Credit: Claiming the Credit and Reconciling Advance Credit Payments | Internal Revenue S...