State W-2 Forms Nj How To File State Taxes In Different States?

How to file state taxes in different states? - state w-2 forms nj

My employer filed state taxes in New Jersey for me, and I lived in CT. Now my W-2 form with taxes to the State of New Jersey is paid.

How do I start to make a tax return? Do I have to file there taxes and CT New Jersey? What options do I have?

Thanks