I can only tell you what worked for us. We told Turbo Tax that we DID NOT purchase our insurance through the marketplace. I used Ferguson calculator to determine PTC and self-employment deduction based on our income (link to calculator is in one of my messages--let me know if you can't find it). I used this info to entered self-employment deduction in business expenses, where by the way the guidance is NOT to do this (ignore). TurboTax then correctly figured premium tax credit on the PTC form. I made sure deduction and credit did not equal more than total premiums for health insurance. Make small adjustments to the self-employment deduction if they do. Good luck!
