Even if Schedule K-1 is missing the relevant code, you can still report health insurance premiums you paid out of pocket, as long as you meet the criteria. See: Can I deduct health insurance premiums as an S Corporation shareholder?
When entering Schedule K-1, continue to the Other Situations page and check the box for "I personally paid health insurance..." Then enter your S-Corp wages and the amount of premiums you paid on the Self-Employed Health Insurance page. This entry will carry the premiums to Schedule 1 Line 17.
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