New Jersey Treatment of Section 1202 stock

I have a gain on section 1202 stock in 2020.   For federal purposes it is eligible for a 50% exclusion.  New Jersey does not appear to adopt this exclusion.  However, none of the gain, not 50% nor 100% is carrying over to my New Jersey return.  I do not know why this is happening as everyting I have seen indicates such gain is fully taxable in New Jersey.   Please advise