The FairTax Calculator
Here is a link to find out what your Federal Tax obligations would be under the FairTax. You will need to know what your income is and what your taxes were for 2005. Since you just filed your taxes, you should know these things.
I also saw it here.
You might be surprised.
I'm planning a series of monthly articles on the FairTax on the 15th of each month. Why the 15th? Because April 15th is Tax Day, of course.