Assuming your NJ-source income consists entirely of W-2 wages or salary:
The income you earned as a CT resident is taxable by both NJ and CT; the income you earned as a PA resident is taxable only by PA due to PA-NJ reciprocity. So you'll file a non-resident NJ return reporting only the portion of your income earned as a CT resident; a part-year resident CT return reporting all your income earned as a CT resident; and a part-year resident PA return reporting all your income earned as a PA resident. You'll be able to take an "other state credit" on your CT return for the taxes paid to NJ on that portion of your income. You cannot take an other state credit on your PA return, because that portion of your income is taxable only by PA.
When you do your state returns you'll have to allocate the income accordingly.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
