My STBX and I lived in Illinois, and I've recently moved home to MO. The laws in MO are easier to navigate, so we'd like to file for divorce here (it's amicable). I know that the residency requirement for filing is 90 days, what I'm wondering is can we file for a legal separation in Illinois, and THEN file for divorce in MO? Or do they both have to be done in the same state?