Most all Dealers have a DOC Fee!! As I understand this fee is associted with completing all documents regarding the purchasing, titling and registration of your vehicle. Your dealer is probably not going to allow you to NOT pay this doc fee. Therefore you just as well allow them to complete the State Taxes, Title, Registration and Tags. WI Dealer Doc Fee is capped at $152 as of 2021. Since all the state DMV's are pretty much tied together on the internet, your dealership can complete all the necessary documents at the dealership and the Tags, Title and registration will be mailed to your home address. Dealer will provide a temp tag (Usually 30 days) so you can drive the vehicle until your permanent tags arrive in the mail. In other words your State Tax, Title, Registration and Tags fees will be paid to the dealership. Therefore make sure you understand your State Fees and that the dealership doesn't inflate them for additional profit. Hope this helps.