I am waiting to do our 2023 taxes on Turbo Tax as we always do. I get an error message that that Schedule 1, MI-1040 and Form 4884 are not yet available. When available?

Try closing TurboTax, clear your Cache and Cookies, and reopen TurboTax.  Make sure you have ran all updates. 

You indicated that you purchase TTX Home & Business.

That's a "Desktop" program....make sure you re NOT using a browser to log in and use TTX

....you need to use the program installed on your computer.....AND, run the updates again this morning.