Posted April 06, 2012
![avatar](/upload/avatars/2012/02/717495b4c147bd2f933614a51b9d94c63020fb4c_t.jpg)
Amazon Digital Services, Inc.: KS, KY, ND, NY and WA
Source: http://www.amazon.com/gp/help/customer/display.html?nodeId=468512
My guess would be:
Alaska
Delaware
Montana
Oregon
Vermont
These States don't have Sales Tax, so I would think Amazon wouldn't collect tax in those States.