Yes, you can e-file your completed return. Your extension gives you until October 15, 2018 to file your 2017 federal tax return..
When you're ready to file your return, simply sign in at TurboTax.com or the TurboTax mobile app, select the Take me to my return button, and finish your return. (In the CD/download desktop software, just reopen your return and go from there.)
