Do you have to pay sales taxes in Illinois if you buy a used car from a dealership in Wisconsin also where would you go?

Yes, if you buy a used car from a dealership in Wisconsin and plan to register it in Illinois, you will need to pay Illinois sales tax. The tax is typically based on the purchase price of the vehicle. To complete the registration and tax payment, you would go to your local Illinois Secretary of State's office or use their online services. Make sure to have the necessary documents, such as the bill of sale and proof of residency.