If it were my client, I would send the "missing" forms, the e-file-forms-sent listing from the computer with the "missing" forms highlighted, the e-file submission ID/ack, and would also make sure that if there was a 1040 requested, that the client SIGN it. I had a request for a 1040 for someone *just* as backup - forget the details - and the idiots rejected the backup info because it wasn't signed. Took another letter to dope-slap them into admitting the signature wasn't actually needed. I'm seeing more inexcusably incompetent foul-ups with the IRS and have actively been trying to give them no excuse not to do things MY way (because that's the right way, of course - no pride here, nope, uh-uh, no sirree... lol).