I tried a couple times and found out this is the correct solution for me. especially step 1 and step 2. Here is a bit details of what I did. Hope it helps someone.
problem: only k-1 from s corp, no schedule c, having health market health premiums. turbotax online generates a bad form 7206, line 1 is empty.
To solve: Go to Deductions & Credits -> Affordable Care Act (Form 1095-A) -> Edit -> Continue. The problem is the pesky "I'm self-employed and bought a Marketplace plan" box. uncheck that box.
Then go to Wages & Income -> schedule k1 -> edit ->S corporations (update) -> edit -> continue until you see "Other Situations" , check "I personally paid health insurance and/or long-term care insurance premiums for myself and my family and this S corporation paid me wages", -> Health Insurance Premiums You Paid Personally, enter the correct amount (amount you paid plus any credit you might need to pay back, basically the same number when you associate marketplance 1095-A with s-corp).
This will generate a correct form 7206
