While you should qualify for the Self Employed Health Insurance deduction, TurboTax is not really set up for your situation.
One option is to use the CD/downloaded version and override Line 29 on your Form 1040. However, that will void TurboTax's accuracy guarantee and you will not be able to e-file.
Another possible option is to enter the 'fake' K-1 (using your parent's K-1) with all zeros. In the K-1 interview, you could then check the box about health insurance, and it will ask you for some information from your W-2 again (box 5).
