EDITED: 3-18-2017 (I was citing a tax bill that was not made a law for NJ, so TSP is NOT the same as a 401K for tax purposes.
A Federal Government Thrift Savings Plan (TSP), while similar is not treated like a 401K contribution for NJ and you have to do the following for state wages.
Under New Jersey
law, contributions to retirement plans
(other than 401(k) Plans) are included in
State wages on the W-2 in the year the
wages are earned. This may cause your
State wages (Box 16) to be higher than
your Federal wages (Box 1).
http://www.state.nj.us/treasury/taxation/pdf/pubs/tgi-ee/git1.pdf
While the below site from the NJ Military treatment says they are similar they are not similar for income tax reporting.
TSP
The Thrift Savings Plan is a retirement savings plan for FERS and CSRS employees similar to “401 K” plans available in private sectors.
Source: http://www.nj.gov/military/hro/er/tsp.html
