**The information below has not been verified for the 2020 tax year as the IRS Pub. 974 has not yet been released by the IRS.**
The amount of excess premium tax credit repayment, calculated on Line 29 of Federal Form 8962 Premium Tax Credit (PTC), has a different calculation if there was a self-employed health insurance deduction claimed on Line 16 of Schedule 1 (Form 1040) Additional Income and Adjustments to Income.
Per IRS Instructions for Form 8962, starting on page 15:
If you are self-employed and are claiming the self-employed health insurance deduction, see Self-Employed Health Insurance Deduction and PTC in Pub. 974 for the amount to enter on line 28.
The instructions for calculating the self-employed health insurance deduction are explained in IRS Publication 974 Premium Tax Credit (PTC), starting on page 56. On Worksheet X (as explained in the publication), there is a calculation on Line 25 of Part III: Repayment Limitation that reflects the amount that must be repaid.
To review the worksheets that perform the calculation of the repayment limitation:
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Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.