How do I fill this out? The following are the most current versions of Massachusetts Department of Revenue motor vehicle sales and use tax related forms.Learn about bills of sale in Massachusetts for cars, boats, firearms, and more. Our fully customizable template ensures a seamless and legally compliant transaction, giving you peace of mind and saving you valuable time in the process. A Massachusetts motor vehicle bill of sale documents a private car sale between a seller and a buyer. Both parties must sign the form. The buyer agrees to accept the item with any known or potentially unknown defects in the property. For new boats, you'll also need a Manufacturer's Statement of Origin. You'll need to provide proof that your sales tax is paid. Both the buyer and seller must sign the form, and once complete, the sale is finalized.
