Online (vehicle only) at dol.wa.gov. • Mail a Vehicle Report of Sale or Vessel Report of Sale.What information is required to complete a Washington bill of sale? This form below is designed for use on upon the sale of a motor vehicle or automobile. What should you include in your vehicle bill of sale? You must enter the sale price to calculate the use tax. Check or Money Order: Payments can be made via personal checks or money orders made out to the Washington State Department of Licensing. Payment details: Write down the sale price and how you agreed to be paid. In most cases, the buyer will pay a lump sum.