How are you entering it? Only enter it once under self employment. Don't enter it again under Deductions. It's possible for some to show up on schedule A too. Is it from a Marketplace plan?
If you enter the 1095-A and select the "Self-employed and bought a Marketplace plan" box, it will automatically include those premiums in the SE Health Insurance section. So you shouldn't enter it again on schedule C.
Self-employed health insurance deduction goes on Form 1040 schedule 1 line 16, as long as the expense is not greater than your net self-employment income. If it does exceed your net self-employment income it gets split automatically. An amount equal to your net self-employment income goes on Form 1040 Schedule 1 line 16, and the remainder gets added in to medical expenses on Schedule A.
Medicare plan B payments are qualified as Self-employed medical insurance premiums and should be entered under Business instead of in the Social Security Benefits entry area. So go back and take it off your SSA-1099 entry.
