Some taxpayers have discussed a workaround for your situation. If you want to keep the Self Employed Health Insurance Deduction, and you share a Marketplace plan with a non-dependent, you can theoretically allocate 100% of the premium to yourself and not indicate in TurboTax that you shared a policy.
How this will affect your non-dependent's return (if they received their own 1095-A or not) will need to be tested. If you don't want to claim the Self Employed Health Insurance Deduction, don't indicate you were self-employed when entering your 1095-A and split the allocation with your non-dependent.
Here's more discussion on Shared Marketplace Plan if Self-Employed.
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