So you checked the nonresident box on the bottom of the federal information worksheet and noted Wisconsin as the nonresident state and the client is marked as being a resident of MN for the year?  You then prepared the WI return and it reported the proper WI withholding on the nonresident return?  Lastly, you are looking at the M1RCR instead of the M1CR?  If you have done all of that, it should flow automatically.