Abstract: 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.