We can't send encrypted email (or use Link) with tax returns to bankers, because that would be a FS. Clients often can't send encrypted emails.  No one wants to do paper. What do we do? I do not want my EFIN on 8879s.  I don't even want the last 4 digits of my FEIN on the signature page. Why does a client even need my EFIN if it is e-filed?