This document is an IRS Form 56 that provides instructions for notifying the IRS of a fiduciary relationship. It explains that the form should be filed by a fiduciary to notify the IRS any time a fiduciary relationship is created or terminated. It provides details on who qualifies as a fiduciary and instructions on completing each section of the form, including identifying information about the taxpayer and fiduciary, the authority under which the fiduciary is acting, tax notices to be sent to the fiduciary, and revoking or terminating a previous fiduciary relationship.