If I own a LLC with no other access to health insurance and have entered my 1095-A information, where are those premiums deducted?

As Coleen said, you enter your 1095-A information (do a Search (upper right) for 1095-a and click on the jump-to link), and in that interview you associate the 1095-A with your Schedule C business.

The amount of the premiums that you paid with after-tax dollars, if not limited, appears on line 16 of Schedule 1 (1040).

Note that (1) it must be premiums that you paid for with after-tax dollars, and (2) the self-employed health insurance deduction can't be larger than your net profit from that Schedule C. Also note that the line 15 amount ("Self-employed SEP, SIMPLE, and qualified plans") also interacts with line 16 and the net profit of the business, which may causes unexpected limitations to zero.