Example. The entity manager's taxable year is the calendar year. On December 1, 2006, the entity manager approved or otherwise caused the tax-exempt entity to become a party to a transaction that the entity manager knew or had reason to know was a prohibited tax shelter transaction. The tax-exempt entity entered into the transaction on January 31, 2007. The entity manager is liable for the entity manager level tax for the entity manager's 2007 taxable year, during which the tax-exempt entity entered into the prohibited tax shelter transaction.
26 C.F.R. §53.4965-7