The appropriate TTB officer, within the applicable period of limitations, may credit any overpayment of tax, including interest thereon, against any outstanding liability for any tax (or for any interest, additional amount, addition to the tax, or assessable penalty) owed by the person making the overpayment and the balance, if any, shall be refunded, subject to 26 U.S.C. 6402 (c) and (d) and the regulations thereunder, to such person by the appropriate TTB officer.