You do not complete a Form 8962. The TurboTax program generates and completes the Form 8962 after you enter your Form 1095-A that you received from one of the state Marketplace Exchanges for your health insurance.
See this TurboTax support FAQ for the Form 8962 and Form 1095-A as requested by the IRS for 2019 - https://ttlc.intuit.com/community/health-care/help/the-irs-is-requesting-form-8962/01/27409
