Tax Law, §§ 210(3)(a)(2), 211(4)

The receipts factor on a combined report is computed as though the corporations included in the report were one corporation. All intercorporate business receipts are eliminated in computing the combined business receipts factor. Intercorporate receipts are receipts by any corporation included in the combined report from any other corporation included in the combined report. As to when combined reports will be required or permitted, see Subpart 6-2 of this Title.