Another question is what type of income are you earning in Illinois?
Illinois and Wisconsin have reciprocity.
That means Wisconsin residents working as an employee for a company in Illinois should only have Wisconsin state taxes withheld.
Maybe a little more detail on why you are amending Illinois and why you filed a return there in the first place.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
