TaxCloud (http://www.taxcloud.net/) is a free sales tax service for online retailers. It instantly calculates sales tax for any U.S. address. TaxCloud has been certified by the Streamlined Sales Tax Governing Board, so you can be sure that their tax information is accurate and up-to-date. TaxCloud files your sales tax returns with all Streamlined member states and provides easy-to-understand reports for you to use with the remaining states.