NJ tax return is still pending after 5 days. Federal return was accepted.

The pending status means that your state return hasn't been accepted or rejected yet. It's not unusual for the state return to be in a pending status after the federal has been accepted.  Because of the deadline, there's a backlog. 

 Please see the TurboTax article Why is my state e-file still pending?

Be sure to check your email for communication from TurboTax as well.  Make sure your return did not experience any hang-ups that you need to address.