(a) In general. For general definitions regarding section 6694 penalties applicable to preparers of tax returns or claims for refund of tax under chapter 41 of subtitle D see Sec. 1.6694-1 of this chapter.
(b) Effective/applicability date. Paragraph (a) of this section is applicable to returns and claims for refund filed, and advice provided, after December 31, 2008. [T.D. 9436, 73 FR 78460, Dec. 22, 2008]