How it works is that it's online and you simply enter your estimated data. Now while it can't be entirely accurate down to the penny, you can get an idea of what is going on with your taxes so you don't get surprised by an amount owed or if you are getting a refund, you can plan for the future.
If you're like me, you're impatient and want to know right away - regardless of the outcome. This is the perfect tool for those kind of people or simply those who may have an idea of what they might be expecting but simply want to be sure.
Best of all, it's free to use so you can go ahead and get an idea of your tax refund or what you might owe, without having to pay.