SEC. 2. Powers and Duties of the Bureau of Internal Revenue.

SEC. 2. Powers and Duties of the Bureau of Internal Revenue. - The Bureau of Internal Revenue shall be under the supervision and control of the Department of Finance and its powers and duties shall comprehend the assessment and collection of all national internal revenue taxes, fees, and charges, and the enforcement of all forfeitures, penalties, and fines connected therewith, including the execution of judgments in all cases decided in its favor by the Court of Tax Appeals and the ordinary courts. The Bureau shall give effect to and administer the supervisory and police powers conferred to it by this Code or other laws.


Source : http://www.bir.gov.ph/index.php/tax-code.html