Does UC San Diego Library license Endnote?
UC's have EndNote web for free as part of our Web of Science subscription.
See the comparison chart of major features of popular citation management software including EndNote, Zotero, Mendeley, and EndNote web at https://ucsd.libguides.com/howtocite/compare to help you decide what is best for your situation.
If you are interested in purchasing EndNote 20 for the desktop, the UC San Diego Bookstore offers a 20% discount off of list price at https://ucsandiegobookstore.com/c-332-miscellaneous-software.aspx for UCSD affiliates.
Also via On The Hub, UC students may purchase EndNote 20 for desktop at a deeper discount, while UC faculty and staff may upgrade an existing older version of EndNote at a discount: