Every partnership (as defined in section 761 (a)) shall make a return for each taxable year, stating specifically the items of its gross income and the deductions allowable by subtitle A, and such other information, for the purpose of carrying out the provisions of subtitle A as the Secretary may by forms and regulations prescribe, and shall include in the return the names and addresses of the individuals who would be entitled to share in the taxable income if distributed and the amount of the distributive share of each individual.

Each partnership required to file a return under subsection (a) for any partnership taxable year shall (on or before the day on which the return for such taxable year was required to be filed) furnish to each person who is a partner or who holds an interest in such partnership as a nominee for another person at any time during such taxable year a copy of such information required to be shown on such return as may be required by regulations. In the case of an electing large partnership (as defined in section 775), such information shall be furnished on or before the first March 15 following the close of such taxable year.

Any person who holds an interest in a partnership as a nominee for another person—

In the case of any partnership regularly carrying on a trade or business (within the meaning of section 512 (c)(1)), the information required under subsection (b) to be furnished to its partners shall include such information as is necessary to enable each partner to compute its distributive share of partnership income or loss from such trade or business in accordance with section 512 (a)(1), but without regard to the modifications described in paragraphs (8) through (15) of section 512 (b).

In the case of any electing investment partnership (as defined in section 743 (e)(6)), the information required under subsection (b) to be furnished to any partner to whom section 743 (e)(2) applies shall include such information as is necessary to enable the partner to compute the amount of losses disallowed under section 743 (e).