I have learned over many years that trying to file state business tax returns promptly results in nothing but frustration and huge wastes of time.
1. If this website: https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotaxbusiness_states_windows_sel... says that forms are available on a certain date, it does not necessarily mean that you can start using the program on that date. It means that on that date your state tax agency will have them ready for TTax to download, incorporate them into the program, and send them to you on the next update (notice how, each time you open TTax, it says "Let's install the latest updates").
In my state, NY, it takes at least 24 hours and sometimes longer, before it will open.
2. Even after TTax lets you fill out the return, the state may still getting the bugs out of electronically accepting the return. This can be especially true if there is a separate function or filing within the return. In my case NY has a filing fee for LLC's, that requires a separate form and payment outside the usual tax payment process (incorporated within the e-filing steps. So when I got to that page the link just resulted in an endless loop. I waited a week and it worked.
The number of posts on these pages indicates that these problems are quite common, yet most of TTax's help reps know nothing about them. Apparently most of them are reassigned from other posts during tax season. All they can do is give you that standard fixes, like rebooting, reloading TTax or using a different browser. In all those years, only one rep clued me into the forms availability page.
