Most people use a computer to prepare their yearly income tax returns now. The laws just get more and more complicated -- it's VERY difficult to do it any other way now. The IRS has even stopped mailing the forms booklet now, if you do still want to figure your taxes out by hand, you'll probably have to use a computer anyway so you can go to http://www.irs.gov/ and download and print the blank forms you'll need. (A few libraries and post offices still have a handful of the forms, and what is left is drying up quickly.)
So your choice has pretty much come down to -- are you going to get the software and do it yourself, or are you going to see a tax professional and have the help of their software?