Can you please clarify why is it not letting you e-file the NJ return?
Does it give you any error or message when you try to file?
Make sure that your software is updated. You can also check on the link below if your state forms are ready to be e-filed. If a specific form included in your return says "unsupported" it means that is not supported by TurboTax and you will need to mail that specific form or the whole return.
When will my individual tax forms be available in TurboTax?