Tax Information


The OSI is a California public benefit (non-profit) corporation, with U.S. federal 501(c)(3) tax-exempt status; our EIN is 91-2037395. Donations to the OSI are tax-deductable for U.S. donors to the full extent permitted by law.

Our 2012 California state tax filing is attached below, and we are working on getting our 2012 Federal filing online.