Yes. If you do not file a Wage Refund petition. If you don’t, you can claim credit on the NJ return for all your Philadelphia wage tax. The City of Brotherly Love will be happy.
The nine months of taxes are not really going to New Jersey. The tax still went to Philly. NJ is just giving you credit for tax paid twice on the same income.
You are correct. Without the offset of the Philly wage tax you will owe a lot to NJ and will probably have penalty and interest.
In general, it also takes a long time for the Philadelphia Department of Revenue to refund wage tax payments.
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