I did the nonresident first (Missouri). After it checked it, Turbotax indicated it was complete. After that, I went to my home state of Illinois. I noticed that it said something about Missouri after I completed Illinois. Turbotax would not allow me to add the credit for the local taxes (St. Louis) paid to the other state taxes and after I completed it, it indicated I could not submit it electronically because of issues. After this and other things in the Federal Return, which were needlessly complicated, I gave up with Turbotax.
