Did you install it yet? Did you buy the CD or the Download? You don't need to "register" it. You have a License Code. When you start the program it will have you fill out some info before you start filling out the return. If you bought the CD and haven't installed it yet, it is better to use the download method instead.
How to install the Desktop CD/Download program with a License Code
How to install TurboTax CD/Download software with license code
