For all services related to your BOL/UCLA Logon account, please refer to this page. This includes looking up your username, changing your password, setting up a security question, etc.
You can find more information about BOL's services at their website. Questions regarding your account can be directed to the BOL Helpdesk, which is reachable through phone at campus extension x74357 (310-267-4357) and through email at email@example.com. Walk-in consulting is also available at Kerckhoff Hall, Suite 124.