Thanks for the inspiration! I just went through the NJ income process again and had a second thought about this question below - initially i thought this refers to the box 16 on the 1099-R which is blank so i just put 0. because it is under the title 'enter the details about your Roth conversion". now i understand this refers to the distribution originally made to the traditional IRA. i updated it to 6000 and that fixed the NJ tax.
"Contributions Related to This Distribution Previously Taxed by New Jersey"
