(a) In general. If a notice of the beginning of an administrative proceeding is mailed to the tax matters partner with respect to any partnership taxable year, the tax matters partner shall furnish to the Internal Revenue Service office that issued the notice the name, address, profits interest, and taxpayer identification number of each person who was a partner in the partnership at any time during that taxable year if that information was not provided on the partnership return filed for that year.

(b) Revised or additional information. If the tax matters partner discovers that any information furnished to the Internal Revenue Service on the partnership return or under paragraph (a) of this section was incorrect or incomplete, the tax matters partner shall furnish revised or additional information to the Internal Revenue Service within 15 days of discovering that the information furnished to the Internal Revenue Service was incorrect or incomplete.

(c) Information required with respect to indirect partners. The requirements of this section for identifying information apply with respect to indirect partners to the extent that the tax matters partner has such information.

(d) Effective date. This section is applicable to partnership taxable years beginning on or after October 4, 2001. For years beginning prior to October 4, 2001, see § 301.6230(e)-1T contained in 26 CFR part 1, revised April 1, 2001.