How can I notify IRS on the changes in my organization's governing policies/bylaws?

You can provide a conformed copy of the document with details of the changes made in the organization and have it signed by an officer in the organization's authority.

If filing electronically, send a conformed copy of the changes to the IRS at the address mentioned below.

Internal Revenue Service

TE/GE—EO Determinations

P.O. Box 2508

Cincinnati, OH 45201