Though standard form bill of sales are available online and from your local county tax collector's office, it's also perfectly acceptable to write your own. 1. Enter the seller's name and address.This blog post is tailored to help you understand how to draft, why it's necessary, and where you can obtain a Texas bill of sale. The form consists of the significant vehicle, buyer, seller, and sale data, along with affirming signatures from both parties. To qualify for auto financing online, fill in the easy pre-qualification form on our website. AAA can help with registration renewal, duplicate registrations, vehicle transfers, and more.