26 U.S.C. § 6222: Partner’s return must be consistent with partnership return

A partner shall, on the partner’s return, treat any partnership-related item in a manner which is consistent with the treatment of such item on the partnership return. Any underpayment of tax by a partner by reason of failing to comply with the requirements of subsection (a) shall be assessed and collected in the same manner as if such underpayment were on account of a mathematical or clerical error appearing on the partner’s return. Paragraph (2) of section 6213(b) shall not apply to any assessment of an underpayment referred to in the preceding sentence. the partnership has filed a return but the partner’s treatment on the partner’s return is (or may be) inconsistent with the treatment of the item on the partnership return, or the partnership has not filed a return, and the partner files with the Secretary a statement identifying the inconsistency, demonstrates to the satisfaction of the Secretary that the treatment of the item on the partner’s return is consistent with the treatment of the item on the statement furnished to the partner by the partnership, and elects to have this paragraph apply with respect to that item. Any final decision with respect to an inconsistent position identified under subsection (c) in a proceeding to which the partnership is not a party shall not be binding on the partnership. For addition to tax in the case of a partner’s disregard of the requirements of this section, see part II of subchapter A of chapter 68.