Chapter 1: General Registration Information. Official Forms for Viewing and Downloading.Learn about bills of sale in California for animals, vehicles, firearms, and more. Pay bills, get usage details, update your account and more. We've partnered with your county to make secure, trusted, easy payments on your behalf. Find your Contra Costa County tax bill and get started. If you want to respond, fill out form EA120, Response to Request for Elder or Dependent Adult Abuse Restraining. Sign up to pay your property tax bill with easy-to-manage monthly payments with Easy Smart Pay. Drawing for such purposes made on Credit Enhancement provided in the form of an irrevocable, direct-pay letter of credit. How To Pay Your Antioch Property Taxes?