Have you checked your trash folder?
If you did not get an email stating your tax return was either accepted or rejected, you may not have actually submitted your tax return for efiling. You must follow the File section all the way to the end where you click on a big orange transmit return now button.
You can confirm submission and acceptance using this link: https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp
