Enter 0 for the AGI since 2019 didn't get processed on time. They are still not done with 2019 returns. Better check if 2019 was filed and accepted. If you got a letter from the IRS about it then they did get it, but you better call the IRS and ask what they needed. Did you have a tax due or refund? Did you get it?
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?
Then when you efile you get back 2 emails. The first email only confirms the transmission. The second email says if the IRS (or state) Accepte.d or Rejected your efile. Check back though your emails if you have them.