Line 27A is $30000 along with 27 C
It is $30,000 for a single person for 2017. It was $15,000 for 2016, and goes up again for 2018, 2019 and 2020.
https://www.forbes.com/sites/ashleaebeling/2016/10/13/new-jersey-retirement-income-break-to-quintupl...