It is BS.. I went to their storefront and added it and before I filled anything out they added "tax"..Something we don't pay in Oregon.
You can get it from Amazon for the "pre-tax" price of $249.
To be fair to them they do not call it a Federal Tax.
I purchased an Akitio Thunder Dock at their on line store for $249 & I was charged $19.92 for what they call a Federal Tax. Anyone heard of this tax? I buy online frequently and have been never charged this tax.
Amazon charges tax on orders to GA. I order from B&H or Newegg.
Us Oregonians don't pay any State Sales Tax. We're on the hook for other applicable taxes.
When I ordered my rMBP from MacMall, they wanted to charge sales tax as they had a business presence in our state. So I had them ship to my niece in a state next door where they had no presence.... and therefore no sales tax charged.
In the fall many states will have a tax free weekend when clothes, computers and other items are sold tax free. Some states may have a limit on the quantities or dollar limits on computers. You can easily save $100-200 in taxes that weekend plus get free shipping. Great time to buy refurbed equipment.