Sign in to the At Your Service Online. On the landing page you will see an area title "About" where there are links to change contact information, beneficiaries (and the percentages assigned to them), and your username and password.
or contact Customer Service
email: customer.service@ucop.edu
Phone: 1-800-888-8267 (in U.S.)
Phone: 1-510-987-0200 (from outside the U.S.)
Monday through Friday, 8:30 am—4:30 pm (PT).
Home < Frequently Asked Questions < How do I change/update . . .
(and the percentages assigned to them), and your username and password.