Forms RUT-25 and RUT-50 for vehicle use tax are multi-part (carbon) forms and cannot be faxed or downloaded. These forms are generally obtained when you license and title your vehicle at the local driver's license facility or currency exchange.
If you need to obtain the form prior to registering the vehicle, you can request copies to be mailed to you by calling the Illinois Department of Revenue's 24-hour Forms Order Hotline at 1-800-356-6302.