Deductions & credits
In TurboTax, you do need to enter the Form 1095-A in order to reconcile any tax credits for the ACA plan.
Once that information is entered, TurboTax will take the net premiums (premium less the credits or subsidies, if any) and move them to your Schedule C when you check the box "I'm self-employed and bought a Marketplace plan."
Even though the question says I and you indicate this is a family member, please check this box to transfer the data properly - this is a TurboTax question not something that directly ends up on your tax return - we are just telling TurboTax what to do with the information here.
That screen looks like this, and it is after you have entered all of the 1095-A data in the Health Insurance section of the program:
