First time I get this error code.
Called Efile helpdesk and they can’t figure it out either.
do you have a business or rental statement or etc…?
best bet contact firstname.lastname@example.org
Yes there is T2125 - error code seems to be from incorrect postal code entered somewhere but I can’t locate any error in any of them.
Problem resolved. Seems there was a discrepancy with Canada Post’s postal codes assignments and CRA’s postal codes list.