Oklahoma state tax always had a line item for internet purchases, where you either had to tell them a total amount spent, a promise that you spent nothing online, or an agreement to just pay a small percentage of your taxable income. I always thought this was stupid as I buy a bunch of little things online. I always grudgingly paid the percentage but recently the state stopped asking this because something like 90% of people said they don't buy anything online. Amazon does charge OK tax now.