Example. In January of 2008, F, a calendar year taxpayer, enters into a transaction that at the time is not a listed transaction and is not a transaction described in any of the paragraphs (b)(3) through (7) of this section. All the tax benefits from the transaction are reported on F's 2008 tax return filed timely in April 2009. On May 2, 2011, the IRS publishes a notice identifying the transaction as a listed transaction described in paragraph (b)(2) of this section. Upon issuance of the May 2, 2011 notice, the transaction becomes a reportable transaction described in paragraph (b) of this section. The period of limitations on assessment for F's 2008 taxable year is still open. F is required to file Form 8886 for the transaction with OTSA within 90 calendar days after May 2, 2011.
26 C.F.R. §1.6011-4