Get your taxes done using TurboTax

If you received an Advanced Premium Tax Credit to cover the cost of the premiums, you would not be eligible for a deduction in addition to the Premium Tax Credit.  

If you did not receive a Premium Tax Credit, after you entered your 1095-A's you should check the box that says "I'm self-employed and bought a Marketplace plan."  This will give you the deduction for your health insurance premiums if you qualify.  If you did not check that box, you can go back to your 1095-A, click edit then go through and click the box. 

Also, if your business did not operate at a profit, you would not be eligible for the deduction.