Reporting requirements.
(3) Reporting requirements. A controlled participant must attach to its U.S. income tax return a statement indicating that it is a participant in a qualified cost sharing arrangement, and listing the other controlled participants in the arrangement. A controlled participant that is not required to file a U.S. income tax return must ensure that such a statement is attached to Schedule M of any Form 5471 or to any Form 5472 filed with respect to that participant.