Yes. You will be able to e-file your federal and state tax returns using the CD/Download version of TurboTax.
However, you will not be able to e-file an extension form.
You can print out Form 4868 and mail it in. To do this please follow these steps:
You can also go to the TurboTax Easy Extension website to file your extension online:
You will be asked to sign in with your TurboTax Online ID. If you don't have one, click Create an Account at the bottom of the sign in screen.
If you have purchased the software you will need to use that to file. If you try to go Online, you will be charged again.