Did you get the NJ property tax deduction instead?
Or, perhaps your income did not qualify. Your gross income must be more than $20,000 ($10,000 if filing status is single or married/CU partner, filing separate return), OR you (and/ or your spouse/civil union partner if filing jointly) were 65 or older or blind or disabled on the last day of the tax year.
https://www.state.nj.us/treasury/taxation/proptaxdeduc_credit.shtml
