@jlsosin See this TurboTax support FAQ concerning the IRS 12c letter and the Form 8962 - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-forms/got-12c-letter-irs-form-8962/L...
You will need a copy of the Form 1095-A sent to you by you state Marketplace Exchange or from healthcare.gov
