The Bureau of Internal Revenue (Filipino: Kawanihan ng Rentas Internas, or BIR) is an attached agency of Department of Finance (DOF).
(The DOF is the executive department of the Philippine government responsible for the formulation, institutionalization and administration of fiscal policies, management of the financial resources of the government, supervision of the revenue operations of all local government units, the review, approval and management of all public sector debt, and the rationalization, privatization and public accountability of corporations and assets owned, controlled or acquired by the government. www.dof.gov.ph)
The official web-site of the BIR provides information, downloadable documents and forms as well as news updates related to latest regulations: http://www.bir.gov.ph/
Our office can introduce you to a specialized law firm to handle your inquiries or requirements.