If you believe that you efiled, you should have received 2 emails from Turbotax.  The first letting you know the return was submitted, the second letting you know whether it was accepted or rejected.

Check your e-file status here to be sure you actually FILED the return and it was accepted:
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp

Paying the TurboTax fees doesn't file the return, you need to continue to the end, and hit the green button to Transmit the return, if you don't recall doing that, you may not have actually filed the return.

Once it's accepted by the IRS you can check on your refund here: https://www.irs.gov/refunds