You must have received a W2 from the S Corp for the medical income. Then in Turbo Tax K-1 page, go through and verify the K-1 entries; and at the end check Other "I personally paid health insurance premiums". Then enter the amount that you paid and continue to have the amount deducted.
The odd thing here is that Turbo Tax has this Schedule 1 deduction within the K-1 page. It belongs elsewhere. The W2 medical payments from the S Corp are not to be included on the K-1 when the K-1 is created; instead a separate W2 is generated that does not have Social Security and Medicare with-holdings. Tom Young's comments to this issue add more detail.
