This is pretty awesome. Very simple to use. All you need to do is load how much you paid in social security tax, medicare tax, and income tax. The web app does the rest - and before you know it you have a complete breakdown of where your tax money was spent.
I think it's very impressive that the White House offers this service. It seems like it was just a few months ago when I found a website that had created a mockup of this same concept. People had been requesting a receipt showing where their tax money was going and now the White House offers such a receipt. Kudos.