When you log into online TurboTax, on the Tax Home webpage you can click Add a State to reopen your tax file. You won't actually be adding a state.
Others have noted that where the IRS has claimed that the taxable amount of Social Security income was incorrectly reported, the user has inadvertently answered Yes to the new-for-2024 question that asks if they were a resident of certain countries (or perhaps you some how skipped that question and TurboTax inappropriately defaulted the answer to Yes).
