@Laotionne - I use the online tax services to complete my taxes each year. The amount I am charged has always been minimal and in many cases there is no charge. Even if you have itemized deductions, the online programs guide you through each step and make the process as painless as possible.
As long as you do not put in any false information, you shouldn't have any problems. Of course, one of the benefits of using a professional tax preparer to do your taxes is that you have a scapegoat if the IRS decides to audit you. This is assuming you provided all of your correct information.