You can pay in-state tuition at Wisconsin public colleges even if you are not a Wisconsin resident. It covers service members and their families while stationed in Wisconsin or within 90 miles of the Wisconsin border, veterans who served at least 10 years and their families, and reserve component members living in Wisconsin who have been active in the Wisconsin National Guard or the Reserves for at least six months.
Tell the admissions or registrar office at the Wisconsin school you are applying to that you are claiming resident tuition on military grounds, and give them your service documentation.
Your orders showing where you are stationed, or your DD214 showing at least 10 years of active duty and an honorable discharge within the last four years, plus copies of the Wisconsin income tax returns you filed if you are claiming as a veteran.