Currently there's no listing of the account username anywhere in the system once on the parent portal. Sometimes, parents just need a reminder of their username and so, since the account username is listed in the Access tab under Update Parent and Student Info (from the admin side of things) then it seems only fair that the account username is listed in the Access tab under My Profile on the Parent Portal.
Another thing that can be implemented as well is the concept of simply letting parents retrieve their account username instead of doing a whole username reset. This will have the benefit of reducing the number of username resets that are needed.