What tax credit or deduction are you referring to? There is nothing I can see that exempts teachers that reside in Wisconsin to be exempt from state income tax. There is a deduction available on the federal return for teacher expenses, though. Tax Tips for Teachers
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**I don't work for TT. Just trying to help. All the best. ***Say "Thanks" by marking as BEST ANSWER and clicking the thumb icon in a post and that I solved your question**Mark the post that answers your question by clicking on "Mark as Best Answer" I am NOT an expert and you should confirm with a tax expert.