If you live in Alabama, Florida, Georgia, Louisiana, Massachusetts, Missouri, New Mexico, South Carolina, or Tennessee, you will soon have a limited opportunity to purchase certain Apple products without paying sales tax, thanks to sales tax holidays provided by those states. Apple has published a list of the states, their respective holidays (generally August 1st, 2nd, and 3rd), and where to find your nearest Apple Store. The tax holidays will also apply to online purchases made by residents of those states. follow link
Beware Country-Specific iTunes Stores
If you buy an iPhone, iPod touch, or iPad, and you happen to be a user of the iTunes Store in more than one country, take note which country's store you're viewing in iTunes when you plug in the device for the first time. This will be the country the device will register with, and you will be forever barred from purchasing or even updating free apps from anywhere else. The only way out is to delete everything on the device and do a full restore.
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How to Get Apple Products Tax Free