Tax help for military filers

I am confused on why I would not qualify for MSRRA.

Not only is my husband a resident in Texas, but I am as well. As far as legal paperwork goes, I am still a resident in Texas (from what I understand). I maintain my Texas driver's license, I am registered to vote in Texas, my vehicles are still registered in Texas, etc. Also, I have earned income in Texas for the past 8 years (including te beginning of this year).

With all of these things considered, should I not receive a tax return from IL for the taxes taken out of my paycheck since I am not legally a resident of Illinois?  And although I know that I do not file a Texas State Tax return, since there is none, how do I prove my residency on my IL Tax Return?

Thanks for your help, just trying to understand everything!