For more than two decades, Avalara has developed one of the most expansive libraries of tax content and integrations in the industry, supporting over 43,000 businesses and government entities ... Avalara web app. Avalara .com Contact Terms Privacy © Avalara , Inc. Learn more about Avalara 's sales and use tax solutions. Unify sales and use tax calculation, document management, and returns preparation within a single platform. Automate your sales tax compliance with Avalara . Our automated tax compliance software helps your business streamline sales tax reporting and filing.