N.J. Stat. § 54:49-17
When, to secure compliance with any of the provisions of any State tax law or of the State Tax Uniform Procedure Law, R.S. 54:48-1 et seq., any moneys shall have been deposited with the director by any taxpayer and shall have been paid over to the treasurer, and the director shall be satisfied that such taxpayer has fully complied with all such provisions, the director shall so certify to the comptroller who shall thereupon issue his warrant to the treasurer for the repayment to such taxpayer of such moneys or such part thereof as the director shall certify has not been applied by him to the satisfaction of any indebtedness arising under any State tax law or under the State Tax Uniform Procedure Law.
Whenever any taxpayer shall be entitled to any refund of taxes or to the repayment of any deposit, or to both, under the provisions of any State tax law or of the State Tax Uniform Procedure Law, and at the same time the said taxpayer shall be indebted to the State for taxes, penalties, interest or fees imposed for the cost of collection under the provisions of any other State tax law or of the State Tax Uniform Procedure Law, the director may apply or cause to be applied the said refund or deposit, or both, or so much of either or both as shall be necessary, to the satisfaction of the said indebtedness, so due from the taxpayer to the State, before making or certifying such refund or repayment.
N.J.S. § 54:49-17