I think you're stuck until you receive a complete and correct 1095-A from the marketplace. I'm not aware of any TurboTax workaround for your situation.
The marketplace issues the 1095-A, not the IRS.
https://www.irs.gov/affordable-care-act/individuals-and-families/health-insurance-marketplace-statem....
Are you sure you're enrolled in a marketplace plan?
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
