Section 26.6694-1 - Section 6694 penalties applicable to tax return preparer(a)In general. For general definitions regarding section 6694 penalties applicable to preparers of generation-skipping transfer tax returns or claims for refund, see § 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 78452 , Dec. 22, 2008, as amended at 74 FR 5105 , Jan. 29, 2009