Abstract: In a fuel excise tax calculation and filing system, a method of generating a set of tax schedules based upon a set of user modified compliance rules without modifying the underlying software code. The system includes an interface process module operable to receive external transactional data and generate internal raw data. The system also includes a compliance matrix process operable to receive the internal raw data and a set of compliance rules maintained by the end user and generates compliant tax schedules for filing. The system also includes a graphical user interface for viewing and modifying the respective databases utilized in the system. The system also contains a form calculation process operable to generate compliant tax schedules. The disclosed method provides a more effective means of updating the fuel excise tax calculation and filing method and system by the end user, without a need to modify underlying software code.