I am foreign traveler and can I buy Mac Pro without tax in LA

If you take delivery in a particular state, you must pay the tax for that state (typically collected by the seller) and it is NOT refundable.

The tax you reference is not a European-style Value-Added tax, but a State-by-State Sales Tax, that is assessed based on the State in which the goods are delivered, such as California..

prasad127 wrote:

I am foreign traveler and can I buy Mac Pro without tax in LA

Some States have no sales tax.

Your references to LA—California City & County Sales & Use Tax Rates - CDTFA

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So no, If you buy in CA you pay The statewide tax rate is 7.25%

Everyone who buys anything in the US pays tax. If the computer is available at a duty free shop at the airport you may be able to buy it tax-free there.