If you have New Jersey income as a nonresident you should report that amount instead of $0 unless your employer withheld NJ tax by mistake.
If you filing a New Jersey nonresident return because you are Pennsylvania resident and your employer mistakenly withheld NJ tax, you will have to file by mail because you must enclose a signed statement with your New Jersey nonresident returns indicating you are a resident of the Commonwealth of Pennsylvania.
The same procedure you apply if you were a remote worker in another state who should not have had NJ tax withheld.
NJ Income Tax – PA/NJ Reciprocal Income Tax Agreement
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