26 CFR § 54.6696-1
Claims for credit or refund by tax return preparers
June 25, 2020
(a) In general. For rules for claims for credit or refund by a tax return preparer who prepared a return or claim for refund for excise tax under chapter 43 of subtitle D of the Internal Revenue Code, the rules under §1.6696-1 of this chapter will apply.
(b) Effective/applicability date. This section is applicable to returns and claims for refund filed, and advice provided, after December 31, 2008.
[T.D. 9436, 73 FR 78459, Dec. 22, 2008]