And for a select few of those vendors, they do have sales tax modules. For another quantity of people, they just bake sales tax into the cost of the item: http

And for a select few of those vendors, they do have sales tax modules. For another quantity of people, they just bake sales tax into the cost of the item: http://www.amazon.com/gp/help/customer/display.html/102-8466456-6712928?ie=UTF8&nodeId=468512 http://www.amazon.com/gp/help/customer/display.html/102-8466... Who knows who's calculating the sales tax for the select retailers.