Do you plan to file your 2009 federal income taxes on form 1040EZ? If so, you can prepare and electronically file your federal return for free on TurboTax.com. Of course if your tax situation is more complicated you'll need to use a different form which means you won't be eligible to use the free version of TurboTax. You'll also have to pay to use their service to file your state return (or you can do it yourself or hire a tax preparer).
TurboTax is an industry leader in the field of tax preparation, and they have an excellent reputation for helping taxpayers get the largest refund possible. And by filing electronically, you'll have your refund in your hands a lot faster than you would by filing a paper return. If you qualify for using TurboTax Federal Free Edition, why not give it a try?