When the online program comes online later this week you will be able to use the Amendment program. Ignore the ADD A STATE instructions and use the amendment option instead.
See this TurboTax support FAQ for the Form 8962 and Form 1095-A as requested by the IRS for tax year 2019 - https://ttlc.intuit.com/community/health-care/help/the-irs-is-requesting-form-8962/01/27409
