Code of Federal Regulations Title 26. Internal Revenue § 26.301.6223(c)–1 Additional information regarding partners furnished to the Internal Revenue Service

(a) In general. In addition to the names, addresses, and profits interests as shown on the partnership return, the Internal Revenue Service will use additional information as provided in this section for purposes of administering subchapter C of chapter 63 of the Internal Revenue Code.

(c) No incorporation by reference to previously furnished documents. Incorporation by reference of information contained in another document previously furnished to the Internal Revenue Service will not be given effect for purposes of section 6223(c) or 6229(e). For example, reference to a return filed by a pass-thru partner which contains identifying information with respect to the indirect partners of that pass-thru partner is not sufficient to identify the indirect partners unless a copy of the document referred to is attached to the statement. Furthermore, reference to a prior general notification to the Internal Revenue Service that a partner who would otherwise be the tax matters partner is a debtor in a bankruptcy proceeding or has had a receiver appointed for the partner in a receivership proceeding is not sufficient unless a copy of the notification document referred to is attached to the statement.

(d) Information supplied by a person other than the tax matters partner. The Internal Revenue Service may require appropriate verification in the case of information furnished by a person other than the tax matters partner. The 30–day period referred to in paragraph (b)(1) of this section shall not begin until that verification is supplied.

(f) Internal Revenue Service may use other information. In addition to the information on the partnership return and that supplied on statements filed under this section, the Internal Revenue Service may use other information in its possession (for example, a change in address reflected on a partner's return) in administering subchapter C of chapter 63 of the Internal Revenue Code. However, the Internal Revenue Service is not obligated to search its records for information not expressly furnished under this section.

(g) Effective date. Except as provided in paragraph (e)(1) of this section, this section is applicable to partnership taxable years beginning on or after October 4, 2001. For years beginning prior to October 4, 2001, see § 301.6223(c)–1T contained in 26 CFR part 1, revised April 1, 2001.