27 C.F.R. § 70.102
(a) Certain failures to pay tax. No addition to the tax shall be made under section 6651 of the Internal Revenue Code for failure to make timely payment of tax with respect to a period during which a case is pending under Title 11 of the United States Code—
(2) If such tax was incurred by the debtor before the earlier of the order for relief or (in the involuntary case) the appointment of a trustee and
(b) Exception for collected taxes. Paragraph (a) of this section shall not apply to any liability for an addition to the tax which arises from the failure to pay or deposit a tax withheld or collected from others and required to be paid to the United States.
(26 U.S.C. 6658)
[T.D. ATF-251, 52 FR 19314, May 22, 1987. Redesignated by T.D. ATF-301, 55 FR 47606, Nov. 14, 1990]