Why are your parents moving to Indiana? If it’s because you’re going to college there, they will consider it a move primarily for educational purposes and you will not be granted instate residency.
Here are their policies: http://policies.iu.edu/policies/categories/academic-faculty-students/university-student-services-systems/USSS-07-rules-determining-resident-nonresident-student-status.shtml
And how you can contact them: http://registrar.indiana.edu/policies/residency.shtml
Contacting them will give you the most definitive answer. You can call anonymously if you want.