This document contains final and temporary regulations providing guidance relating to the requirement of a return to accompany payment of excise taxes under section 4965 of the Internal Revenue Code (Code) and the time for filing that return. These regulations affect a broad array of tax-exempt entities, including charities, state and local government entities, Indian tribal governments and employee benefit plans, as well as entity managers of these entities. This action is necessary to implement section 516 of the Tax Increase Prevention and Reconciliation Act of 2005. The text of the temporary regulations also serves as the text of the proposed regulations set forth in the Proposed Rules section in this issue of the Federal Register.