If everything you have is on your return is from a tax form in the mail (W-2, 1099-INT/1099-DIV, 1098, etc.) then I suggest using turbo tax or some software. It is fairly easy and there probably isn't anything an accountant will find you that your software will not.
if you have a more complicated return (purchased/sold home, schedule c business, rental properties, excessive stock trading, home office, etc.) then go to someone who knows.
like fixing your car....if it is simple then why not do it yourself but when it gets too complicated, why not save your time and pay the people who do that for a living