Over a year ago? Did you ask us or the IRS back then?
Was your return Accepted?
When you log into your account you should see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc. what does it say?
Maybe it Rejected or you didn't finish filing or you were suppose to mail it. 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.
If it was Accepted you have to ask the IRS about it. Maybe they kept it or adjusted your return. You should have received a letter in the mail by now.
