I moved to Minnesota in February from Wisconsin. I forgot to update my W4 with my work until now (December). I kept my same job which is located in Minnesota and previously I had to file as a non resident while living in Wisconsin. Will the date I changed my W4 effect how I file taxes next year? and how do I file?
For tax year 2024, you'll file a part-year resident return in each of the two states. Your income prior to the move will be taxable by both MN and WI; your income after the move will be taxable only by MN. On your part-year WI return, you'll be able to claim a credit for the taxes paid to MN on that portion of your income.
How do I file a part-year state return?
On your W4, you should have taxes withheld only for MN.