Self Employed Health Insurance Deduction with multiple jobs

I had several freelance jobs this past year with some income reported on W-2 and some reported on 1099-NEC. None of them offered health coverage so I purchased a plan on the state marketplace. 2022 TurboTax indicates that you should not input health insurance purchased on a marketplace under Business Income and Expenses (Sch C) but rather input your 1095-A form and it will calculate the self-employed deduction for health insurance. When inputting the 1095-A there is a box you check indicating "I'm self employed and bought a marketplace plan", which then takes you to a screen requiring you to choose which business was associated with the policy.

 

Why does the program require you to pick one business associated with the policy? I needed health insurance and none was provided by any of the jobs I worked. Is it correct to just pick one of the jobs reported on a 1099-NEC and let the program calculate my self employment deduction for health insurance? Or should there be some proration applied?  TurboTax doesn't seem to provide for the latter option.