federal and state returns rejected??!!

So I filed my personal income tax returns for both the federal and the state yesterday.  This morning I see an email from turbo tax that both returns were rejected.  The state was rejected because the federal was rejected.  The reason for the federal said because either the AGI was incorrect or my efile pin was incorrect.  I double checked both and they are both correct.  The only thing I can think is that I had to paper file my 2018 return at the end of December 2019.  Is it possible that the IRS hasn't accepted that return yet and therefore, my AGI from 2018 isn't in the system?  Obviously, I can wait now that the tax filing deadline has been extended to July and I owe tax so I'm not getting a refund.  But just don't know why it is being rejected.