I got Divorced In ND, now neither my ex or myself live in that state, I am back in milwaukee county. I want to know how to change it so it goes through milwaukee court system. but HOW?

You need to file a URESA Petition in Milwaukee County Circuit Court to have your child support case transferred. Be aware - if you moved out of state without the permission of the Non-Custodial Parent, that could come back to visit you... Go to the Self Help Desk at the Milwaukee County Courthouse for the appropriate paperwork.

go to the court building maybe you can ask for a hearing and they would transfer it here maybe where was the child born?