There are a number of companies doing this kind of data collection/rental, though they're mostly focused on the enterprise market. The data is needed by folks l

There are a number of companies doing this kind of data collection/rental, though they're mostly focused on the enterprise market. The data is needed by folks like supermarkets who operate in lots of jurisdictions and need to charge the correct sales tax in each one. In addition to the rates varying by city/county, the taxable items may as well, e.g. in some jurisdictions food isn't taxed, and the definition of "food" varies, too. This is one of the companies that collects a giant database of jurisdictions and tax rates, as well as a db mapping SKUs to jurisdiction-specific tax categories: http://tax.cchgroup.com/sales-tax-data/default.htm?cookie_test=1 http://tax.cchgroup.com/sales-tax-data/default.htm?cookie_te...