This page on the Registrar's Web site links to the UCLA Academic Calendars, which include filing deadlines.
UCLA Policies
The UCLA Library no longer has a Thesis and Dissertation Advisor. All aspects of submitting theses or dissertations are handled in the Graduate Division, including creating an embargo on the availability of the dissertation.
The Graduate Writing Center offers individual consultations and group workshops, including dissertation and master's thesis "boot camps," to all registered UCLA graduate and professional school students.