The amount of tax charged depends upon many factors, including the identity of the seller, the type of item purchased, and the destination of the shipment.
Items sold by Amazon.com LLC, or its subsidiaries, and shipped to destinations in the states of Kansas, Kentucky, New York, North Dakota, or Washington are subject to tax.
For sales tax purposes, electronically delivered products (e-books, e-documents, and electronically delivered software) are considered to be shipped to your credit card billing address.
No sales tax is charged when purchasing gift cards; however, purchases paid for with gift cards may be subject to tax.