Program Information HdL is dedicated to providing accurate data, expert analysis and innovative software solutions that facilitate local government operations and decisions. Its revenue maximization and consulting services include sales, use and transaction taxes, property and documentary transfer taxes. HdL also provides revenue forecasting services and a variety of software systems for streamlining business license, animal control, code enforcement, false alarm and building permit operations. HdL has been a trusted partner with local government since 1983 and currently serves over 350 agencies in six states.