Was it for your own health ins or for your employees?
For your own health insurance you need a Net Profit of Schedule C . And it does not go directly on Schedule C so it won’t reduce your Schedule C profit or the self employment tax.
If your health ins exceeds your net self-employment income it gets split. An amount equal to your net self-employment income goes on Form 1040 Schedule 1 line 17 (to 1040 line 10) and the remainder gets added in to medical expenses on Schedule A.
