accsys - I did not probe further into this with my tax person. I just wanted to get the estate monkey off my back.
I do think that there was more to it than a concern that it was possible for a hacker to gain access to the IRS's computers.
This company also keeps books of record and does financial planning for clients, sets up brokerage accounts, invests people's money for them, etc. So maybe they were also concerned that if they sent hundreds of electronic filings to the IRS, that it could be like advertising that their files were worth hacking into. Just a wild guess.