This disclosure relates to a program controlled apparatus, system and method for identifying taxable financial transactions, collecting data based on the transactions and calculating any sales and/or use taxes due on the transactions. The apparatus comprises a first database having a directory of parameters identifying all domestic government authorities by zip code, geocode, and by jurisdiction name requiring payment of taxes. A second database is provided having a directory of parameters identifying the taxability of goods and/or services for each jurisdiction identified by zip code, geocode, and jurisdiction name in the first database. Also, a third database has a directory of parameters identifying all domestic sales, use and rental tax rates for each zip code, geocode and jurisdiction name. Finally, a server is utilized with programming for determining all taxes due on each transaction request input to the apparatus according to the directory parameters maintained by the first, second and third databases.