N.J. Stat. § 54:39-124
For a supplier to be eligible for the credit provided by section 23 of P.L. 2010, c. 22(C.54:39-123) the supplier shall provide notice to the director of a failure to collect the tax within 20 business days following the earliest date on which the supplier was entitled to collect the tax from the licensed distributor pursuant to section 21 of P.L. 2010, c. 22(C.54:39-121).
A supplier shall supply with the claim for credit such information as the director may prescribe by regulation. The claim for credit shall identify the defaulting licensed distributor and any tax liability that remains unpaid. The credit of the supplier shall be limited to the amount due from the purchaser, plus any tax that accrues from that purchaser from the period from the date of the failure to pay to the date of notification to the director, not to exceed 20 days. Additional credit shall not be allowed to a supplier pursuant to this section with respect to that purchaser until the director has notified the supplier that the purchaser's eligibility to make deferrals in accordance with section 22 of P.L. 2010, c. 22(C.54:39-122) has been restored.
N.J.S. § 54:39-124