I'm seeing the same situation, and I'm concerned there is a problem. I understand that I'm entitled to the self-employed health insurance deduction. The problem is that TurboTax is making an "adjustment" over and above the amount the premium amount that I paid, and TurboTax doesn't explain how it arrived at the new number.
As with the person who started this thread, TurboTax generated a "Self-Employed Health and Long-term Care Insurance Deduction Worksheet" for me. Line 5 of the worksheet shows $500 (to use a round number) for the deduction, saying I should enter $500 for the self-employed heath insurance deduction on Form 1040 or Schedule 1. Great! I agree! That is the amount I paid for the premium and is the amount I can enter on schedule 1.
BUT the bottom of the worksheet says: "A self-employed health insurance adjustment of $<number> from premiums paid through an exchange is included as an adjustment to income but does not appear on these worksheets."
In other words, the ACTUAL number TurboTax places on Schedule 1 and line 10a of the 1040 is $900 (the sum of $500 plus the $400 amount listed at the bottom of the worksheet). I determined after a lot of sleuthing that the number at the bottom of the worksheet (say, $400) is from column A of Form 1095A. I don't see any justification for this extra adjustment to income. I don't qualify for the premium tax credit or related credits.
I have spent hours on the phone with TurboTax support, have spoken with my accountant, and have read numerous IRS publications. No one can explain what TurboTax is doing. It seems that Turbox tax is incorrectly calculating the amount of the self-employed health insurance deduction it puts on line 22 of Schedule 1 and on line 10a (adjustments to income) of form 1040.
In my particular situation, I'm the single employee of an LLC that is taxed as an S-Corp. I'm entitled to claim the self-employed health insurance deduction although I'm not a schedule C filer. I believe TurboxTax should be ignoring the information in Form 1095A and should only pay attention to the health insurance premium amount included in box 1 of the employee's W2.
