Reciprocity

[TonyC18]

How do I file if I live in Wisconsin and my employer withheld both Illinois and Wisconsin taxes? 

[MarilynG1]

Wisconsin has an income tax reciprocity agreement with Illinois, under which residents of one state that work in the other are required to file a tax return and pay taxes only in the state of legal residence.

However, since you had tax for both states withheld, prepare a Non-Resident return for IL first, then your Resident WI return.

See if you can get your employer to start withholding only WI taxes, so that you can file only a WI resident return in the future.

Here's more info on How to File a Non-Resident State Return. 

[TonyC18]

Thank you. After some reading that was how I proceeded. That you for sharing the information.