How do I know if a charge is taxable and what is my sales tax rate? May 08, 2020 21:10 Updated Consult your dealership's Controller or finance contact to determine taxability and state requirements. Related articles What is the difference between charging Fuel and charging a Fuel Convenience Fee? How do I configure dealership settings during Dealerware Setup? What is a vehicle status and how do I update it? How do I use Vehicles Not Under Contract section in Dealerware Web? Where can I find the ACH Request Form?