Use this form to gather necessary information when you sell your vehicle or vessel. Access bill of sale form templates and learn how to transfer ownership of vehicles, boats, firearms, and other high-value personal items in Washington.Washington law requires sellers to separately state the amount of retail sales tax due on customer sales slips, contracts, invoices, or other sales documents. This page provides an overview of sales and use taxes for local governments in Washington State, including the various sales tax options available. Instructions to Vendor or Claimant: Submit this form to claim payment for materials, merchandise or services. Sales taxes in the United States are taxes placed on the sale or lease of goods and services in the United States. Sales tax is governed at the state level. Sales taxes in the United States are taxes placed on the sale or lease of goods and services in the United States. Real Estate Excise Tax Documents. Learn about sales invoices, including definition, what information they should contain, and how to create one.