You are not permitted a self-employed health insurance deduction for any portion of your health insurance premiums covered by PTC. Because PTC depends on AGI and AGI depends on the self-employed health insurance deduction, TurboTax performs an iterative calculation to determine both of these values together.
On the Self-Employed Health Insurance page that Critter-3 showed, enter only your Medicare wages. Leave the box for Premiums you Paid Personally blank. On the page in the Form 1095-A section that asks you to Let us know if any of these situations apply to you, mark the box to indicate that "I'm self-employed and bought a Marketplace plan." (For the purpose of the self-employed health insurance deduction only, you considered self-employed.) On the next page, indicate that the Income was from the S corp and indicate the months of coverage. TurboTax will perform the iterative calculation to determine the amount of your PTC and the amount to include on Schedule 1 line 16.
