26 U.S.C. § 6050K

1. (a)Except as provided in regulations prescribed by the Secretary, if there is an exchange described in section 751(a) of any interest in a partnership during any calendar year, such partnership shall make a return for such calendar year stating—Such return shall be made at such time and in such manner as the Secretary may require by regulations.
   1. (1)the name and address of the transferee and transferor in such exchange, and
   2. (2)such other information as the Secretary may by regulations prescribe.
2. (b)Every partnership required to make a return under subsection (a) shall furnish to each person whose name is required to be set forth in such return a written statement showing—The written statement required under the preceding sentence shall be furnished to the person on or before January 31 of the year following the calendar year for which the return under subsection (a) was required to be made.
   1. (1)the name, address, and phone number of the information contact of the partnership required to make such return, and
   2. (2)the information required to be shown on the return with respect to such person.
3. (c)
   1. (1)In the case of any exchange described in subsection (a), the transferor of the partnership interest shall promptly notify the partnership of such exchange.
   2. (2)A partnership shall not be required to make a return under this section with respect to any exchange until the partnership is notified of such exchange.