[CrazyCatDog]

Even were this not the case—short of an arrest, there is no way for the federal government to “serve you” in a contactable manner—whereas my sense is that this is not the case in Estonia and a growing number of spam nations, ie the government can mandate that citizens be reachable digitally (e.g. portal login is sufficient). The IRS has no inexpensive and scalable way of proving that the person on my end of the Internet is the person with the SSN in the filling (login.gov is great but not pushed throughout all the service branches).

[ikr678]

I think the bigger issue is the complexity of personal taxes in the US. The technology is a solved problem. Australia has had a government provided free tax client since 1998 with pre-fill facilities, which was retired & moved to a web portal in 2016.

You have entrenched interests keeping the whole process as difficult as possible.