N.J. Stat. § 54:54-6
For the purposes of determining any tax credit based on employment provided by law, rule or regulation by the State, covered employees of a client company shall be considered employees solely of the client company, and the client company shall be entitled to the tax credit based on the number of the client company's covered employees, notwithstanding that an employee leasing company is the W-2 reporting employer for the covered employees. Each client company shall be treated as employing only those covered employees co-employed by the client company, and not covered employees employed by other client companies of the employee leasing company. Each employee leasing company shall provide, upon request of the Division of Taxation in the Department of the Treasury, employment information reasonably required for the administration of any tax credit program. Each employee leasing company shall provide, upon request by a client company, employment information necessary to support any request, claim, application, or other action by a client company seeking any such tax credit. As used in this section, "employee leasing company," "client company," and "covered employee" shall have the same meaning as set forth in section 1 of P.L. 2001, c. 260(C.34:8-67).
N.J.S. § 54:54-6