N.J. Stat. § 54:4-8.46
Where title to property as to which a deduction is claimed is held by claimant and another or others, either as tenants in common or as joint tenants, claimant shall not be allowed a deduction in an amount in excess of his proportionate share of the taxes assessed against said property, which proportionate share, for the purposes of this act, shall be deemed to be equal to that of each of the other tenants, unless it is shown that the interests in question are not equal, in which event claimant's proportionate share shall be as shown. Nothing herein shall preclude more than one tenant, whether title be held in common or joint tenancy, from claiming a deduction from the taxes assessed against the property so held, but no more than the equivalent of one full deduction in regard to such property shall be allowed in any year, and in any case in which the claimants cannot agree as to the apportionment thereof, such deduction shall be apportioned between or among them in proportion to their interest. Property held by husband and wife, as tenants by the entirety, shall be deemed wholly owned by each tenant, but no more than one deduction in regard to such property shall be allowed in any year. Right to claim a deduction hereunder shall extend to property the title to which is held by a partnership, to the extent of the claimant's interest as a partner therein, and by a guardian, trustee, committee, conservator or other fiduciary for any person who would otherwise be entitled to claim such deduction hereunder, but not to property the title to which is held by a corporation; except that a residential shareholder in a cooperative or mutual housing corporation shall be entitled to claim a deduction he is otherwise eligible to receive, to the extent of the proportionate share of the taxes assessed against the real property of the corporation, or any other entity holding title, attributable to his unit therein.
N.J.S. § 54:4-8.46