After you file

I have the EXACT same situation.  I called yesterday was on phone for 2hrs while they had me do this and that. Nothing worked. IRS doesn’t have the return that’s all I found out.  So it’s sitting in a pending status.  I fixed live 21c after the fact but it is to late, I already transmitted. They should have not let  it go through if there was an update. My only recourse is to file with someone else like tax act.