â–¡ Not included with the vehicle sale. For the buyer, the bill of sale documents the purchase price of the vehicle for sales tax purposes.A Utah motor vehicle bill of sale, known as Form TC-843, is an official document that provides proof that a vehicle has been sold in the State of Utah. Edit, sign, and share utah bill of sale filled out example online. No need to install software, just go to DocHub, and sign up instantly and for free. Create a Utah bill of sale form to document the transfer of ownership of a vehicle or another piece of personal property. 1. Obtain the Utah State Motor Vehicle Bill of Sale form. Use a Utah motor vehicle bill of sale form to create a legally binding record of your vehicle sale and confirm ownership transfer. Gather the title, bill of sale and odometer disclosure to sign, submit and transfer as required.