Sorry you can’t efile 2023. You have to print and mail it. You can only efile 2024. And you can’t use the Online version to do 2023. Online is only good for 2024. Are you using the Desktop program?
It’s too late to start a 2023 or prior online return or use the mobile app, either on Turbo Tax or the IRS. And too late to efile 2023.
If you need to do 2023 or prior you can buy the Desktop download here,
TurboTax 2022 Prior Year Tax Prep - File Past Years' Taxes
You will need a full Windows or Mac to install it on.