If you did not receive a Form 1095-A for your health insurance, and you were covered all year by an ACA compliant plan, just indicate 'covered all year' in the Health Insurance section (screenshot).
Answer NO to '.. any of these types of plans?' and Continue until you reach 'Done with Health' (screenshot).
You can also claim Health Insurance Premiums as an Itemized Deduction, in the Deductions & Credits section, under Medical Expenses.
If you are referring to the Health Coverage Tax Credit, here's how to claim that:
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Edited 3/20/19 5:07 pm