It just goes to show, this is only a deal at all if you have the 20% off. I was surprised it was taxed. I was going to ask someone, but I had to be at work. And a couple minutes at work is about a dollar for me, so screw it, haha.
They should NOT charge TAX on these. The PSN Store will ALSO tax the purchase, so you are being double taxed. I was going to pick one up, but I may pass now. I have GameRush credit and my credit is generally better than 20% off.
It is rediculous that you have to pay $54 dollars or so for a $50 value on the PSN ... thank goodness I have a credit card.