SpeedTax also said it had partnered with LCR-Dixon, a firm that provides SAP tax applications and services. SpeedTax also released an address validation feature that can be validated to the rooftop level via geocoding technology and with is matched against information from the U.S. Postal Service. SpeedTax is providing the calculator free and says that the Internet-based system gives more precise sales tax rates than the previous systems that use Zip Codes or Zip+4 . Users can access the tool at www.speedtax.com/sales-tax-calculator. The calculator also provides a breakdown of the total sales tax rate by each taxing jurisdiction and also a Google Map position of the address for which the calculation is being made.