Report all your income on your New Jersey Resident return. The state interview will ask if you have non-New Jersey income or taxes paid to another state and give you credit for tax you paid to Pennsylvania.
Prepare your Non-Resident Pennsylvania return first.
The TSP retirement contributions are for your Federal return, so you won't have to enter that amount in your state returns.
More info:
https://ttlc.intuit.com/replies/3302052
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