There is no point in e-filing an amendment if I cannot do it for a client that I did not originally prepare the return. Most of the amendments I have done and I do are for clients that come to me to correct a mistake done by someone else.

Nowadays, with all the delays implied because of the covid related issues, e-file a 1040x is needed as never before, since the paper returns are taking forever to be processed if not lost in the system.