SE Health Insurance doesn't actually show up on Schedule C. Self-employed health insurance deduction goes on Schedule 1 line 17 (which goes to 1040 line 10), 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 Schedule 1 and the remainder gets added in to medical expenses on Schedule A. It will not reduce any SE Tax on a net profit. It just reduces your AGI.
