Print your return and mail it in. Your Turbotax fees cover preparation and e-filing, and e-filing is never guaranteed because it's not under control of Turbotax. You still got the preparation services.
Be careful that you really can't be claimed as a dependent; unless you are claiming certain education credits, checking or not checking the "I can be claimed as a dependent" box won't change your tax return but could really mess up your parents return. The IRS will investigate you and your parents to see who is correct.
