N.J. Stat. Ann. § 3B:18-24

Commissions in the amount of 6% may be taken without court allowance on all income received by the fiduciary. For the purposes of this section, income which is withheld from payment to the fiduciary pursuant to any law of this State, or of the United States, or any other state, country or sovereignty or of any political subdivision or governmental unit of any of the foregoing, for income tax or other tax purposes, shall be deemed to be income received by the fiduciary, and shall be subject to income commissions as if actually received by the fiduciary.