1. A method of generating a set of tax schedule information comprising: (a) providing an Excel interface, the Excel interface being associated with a set of commands and functions; (b) accessing a separate database, the separate database storing a set of data, the set of data having been defined using the set of commands and functions; (c) manipulating the set of data according to the set of commands and functions to generate a set of tax schedule information; and (d) storing the set of tax schedule information in a separate database.