To change a domain, add the domain into the username of the older student. Please see example below: Example: Username: jdoe.school.district.tx Password: ***************** If you do not know the domain assigned to your school please refer to the parent letter you received from school.   Please contact the Texas SUCCESS support center at help@texassuccess.org or 877.315.4918 – toll free if you have difficulty locating the domain name information.