Example. In 1973, D, an individual taxpayer who was a disqualified person under the provisions of section 4946(a)(1), participated in an act of self-dealing with a private foundation and incurred a tax under section 4941(a)(1). On May 15, 1974, the private foundation files a Form 990-PF and answers all the questions thereon with regard to any acts of self-dealing (as defined in section 4941(d)) in which it may have engaged in 1973. Assuming that the foundation's return was not a false or fraudulent return nor made with the willful attempt to defeat tax, the period of limitations on assessment and collection under section 6501(a) shall start with respect to any tax under section 4941(a) or section 4941(b) imposed on D arising out of that transaction with such foundation.
26 C.F.R. §301.6501(n)-1