Authority of Collector to make compromises and to refund taxes.
Section 309
SEC. 309. Authority of Collector to make compromises and to refund taxes. — The Collector of Internal Revenue may compromise any civil or other case arising under this Code or other law or part of law administered by the Bureau of Internal Revenue, may credit or refund taxes erroneously or illegally received, or penalties imposed without authority, and may remit before payment any tax that appears to be unjustly assessed or excessive. He shall refund the value of internal-revenue stamps when the same are returned in good condition by the purchaser, and may, in his discretion, redeem or exchange unused stamps that have been rendered unfit for use, and may refund their value upon proof of destruction. The authority of the Collector of Internal Revenue to credit or refund taxes or penalties under this section can only be exercised if the claim for credit or refund is made in writing and filed with him within two years after the payment of the tax or penalty.