The fact that you're moving this summer, confirms that your time in MN was temporary, for the purpose of attending school, and your intent was not to establish permanent residency in MN.
IL will give you a credit, or partial credit for the tax you pay to MN. You usually come out even, either way, except for the cost and hassle of preparing two state returns.
Getting a MN drivers license woulda been helpful but still not enough to establish residency.
