Illinois Non-Resident Income Tax and Reciprocal Agreements
Illinois has reciprocal agreements with Iowa, Kentucky, Michigan, and Wisconsin, affecting Illinois non-resident income tax. If you're a resident of one of these states but work in Illinois, you may be exempt from Illinois state tax on your wages. However, this doesn't apply to other income types, such as rental income from Illinois property. File the appropriate exemption forms with your employer to avoid Illinois tax withholding.