The indication is that an update of forms is needed. This appears to be untrue since all forms look OK and the return was filed. Tried uninstall and reinstall of Turbotax Desktop Premier Windows but this did not resolve the problem for me. Work around: by going to the "Forms" view, any IL State form can be viewed and printed, one-by-one. Only residual problem is that it is not possible to save a pdf file of the Illinois return.
Update 2/13/2023; This issue has now gone and normal printing is available. May be due to an Illinois update just received.
It is possible some forms needed are not yet available. Please see this Turbo Tax FAQ on State forms availability for personal use.
State forms availability table for TurboTax individual (personal) tax products.
Why does DO NOT FILE, FORM NOT FINAL appear on my printouts?
None of my forms showed the DO NOT FILE message, so I filed. Seemed to go OK but I will update if there is any issue.
Also checked your link re: availability; all forms for IL state tax are shown available to print or file. So, I don't think that is the issue.