Taxpayer files MFJ.

The spouse mistakenly withheld taxes to Wisconsin, and they reside in Illinois.

IL and WI have a reciprocal agreement.

Based on my understanding, there is a way to make this only an Illinois state return, or at least ensure the reciprocal agreement is being recognized in ProSeries.

How do I do so?

https://tax.illinois.gov/questionsandanswers/12.html#:~:text=agreement%20with%20Illinois%3F-,What%20....