When will Illinois forms be available to view, print and/or download? Turbo Tax message states: My Illinois return is currently unavailable

This is a known issue and is currently being fixed by intuit.

Here is a workaround

https://ttlc.intuit.com/questions/4583658-why-can-t-i-print-my-illinois-state-return?jump_to=answer_...

Tried the workaround-not successful; When downloading Illinois, it states software is updated.  Cannot View, download, or print or save as a Pdf.  Been a customer for over 20 years.  Would appreciate your help in resolving this problem

Follow the detailed instructions here; <a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/4611225-can-not-print-my-2018-il-state-forms">https://ttlc.intuit.com/questions/4611225-can-not-print-my-2018-il-state-forms</a>
Removing the three files seems to be the trick. Restart TurboTax after removing the files.

Here we are again - January 4, 2021 -

and the Illinois State download appears to fail.....

probably like many states not ready because the IRS has not finalized its forms.  you can't e-file Illinois until the IRS opens e-filing probably late January 2021. could be later since the IRS may have to modify its forms to take into account the second stimulus.