Apparently, they were holding returns which included Form 8606 regardless whether the IRA was inherited or not.  My rejections were both returns which did NOT have an inherited IRA so the explanation for the rejection made no sense.  Instead of wasting time on the phone with customer service, which would have been pointless anyway, I figured I would wait to see if it was fixed by March 5th.  It was after that when I discovered the real problem on the Form 8606, which did in fact have to do with an inherited IRA.

After the program updated, nothing changed on the two previously rejected returns and I retransmitted them without issue.  As for the return with the inherited IRA, the Form 8606 appears to be calculating properly now.  I have yet to transmit that return.