In a reviewed opinion, the Tax Court has found that a sophisticated taxpayer (i.e., a hedge fund manager) could not avoid penalties by relying on the reasonable cause defense under Sec. 6664(c)(1) where the taxpayer presented no evidence that the omitted income was because he relied on advice given by the tax return preparer.
Read the opinion here:
Woodsum v. Commissioner, 136 T.C. No. 29 (2011)