Yes if you didn't efile or it rejected or mailed it you can try to efile again. Click on Add a State to let you back in. If it did go though the first time it the second time will reject. That's ok.
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?
You can check your efile status here,
https://turbotax.intuit.com/tax-tools/efile-status-lookup
