Thank you. In this case, I know exactly what changed, because the corrected W2 only had one box with a different number: Box 16 - State wages, tips, etc., for Wisconsin (my state of residence).
The total wages on the W2 didn't change, and the Minnesota wages didn't change, so there's no change in tax for Federal and Minnesota. The change to Wisconsin income didn't affect the taxable amount because it was already included in the federal adjusted gross income on line 1 of the WI return.
Bottom line is that I don't need to file the amended return.
