Turbo Tax only knows if the IRS Accepts your return for processing or if it was rejected. They won't know if you mailed your return.
If you used the Online version you can check your efile status here
https://turbotax.intuit.com/tax-tools/efile-status-lookup/
When you efile you get back 2 emails. The first email only confirms the transmission. The second email says if the IRS (or state) Accepted or Rejected your efile.
When you log into your account you should also see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc. What does it say?
If your return was Accepted then check IRS Where's my refund
https://www.irs.gov/refunds/
