26 CFR § 301.6227(d)-1 - Administrative adjustment request filed on behalf of a partner.
(a) In general. A request for an administrative adjustment on behalf of a partner shall be filed on the form prescribed by the Internal Revenue Service for that purpose in accordance with that form's instructions. Except as otherwise provided in that form's instructions, the request shall -
(1) Be filed in duplicate, the original copy filed with the partner's amended income tax return (on which the partner computes the amount by which the partner's tax liability should be adjusted if the request is granted) and the other copy filed with the service center where the partnership return is filed (but, if the notice described in section 6223(a)(1) (beginning of an administrative proceeding) has already been mailed to the tax matters partner, the statement should be filed with the Internal Revenue Service office that mailed such notice);
(4) Relate only to partnership items; and
(b) 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 § 301.6227(c)-1T contained in 26 CFR part 1, revised April 1, 2001.