Why am I charged tax for my Apple purchases?
Why do I get charged for tax in any of my purchases with Apple
[Re-Titled by Moderator]
Usually because the the jurisdiction identified by your address requires the collection of taxes.
What purchases are taxed and how much is determined by the jurisdiction.
If you believe you should not be taxed on some or all of your purchases, you'll want to discuss that directly with Apple and potentially also with legal- or accounting-related assistance.