In the United States products are taxed at the state, county, city levels, in addition to any local specific taxes. The sales tax is a tax on sales of retail of goods to end consumers.
For latest State & Local Sales Tax Rates
The goal Streamlined Sales Tax group is to simplify and modernize sales and use tax collection and administration in the United States. The SST technical committees developed and XML based schema with the help of the FTA e-standards group. The SST XML Schema allows states to develop systems to process sales tax returns and payments from sellers. It allows sellers to file and pay to participating states using the same process.