N.J. Stat. § 43:21-7d
If an employer fails to make any report or permit any inspection required by the commissioner to implement the provisions of this act, an estimate shall be made regarding the liability of the employer from information available and the employer shall be assessed for any amount due, including the amount that was withheld or that should have been withheld from its employees for deposit into the fund. Also, if, after an examination of any report filed, a deficiency is discovered with respect to the taxable wages reported, the employer shall be assessed the amount of any determined deficiency. Additional remedies through the court may be established by the commissioner, including the charging of any expenses incurred by the department in recovering the assessment.
N.J.S. § 43:21-7d