What should I do if I worked in NJ but live in PA? My W-2 shows NJ for tax [Box-15] and nothing about PA. Is this a mistake on my W-2?

On my W-2, I have a copy for Employee Records, a copy to be filed with Employee's Federal Return and a copy to be filed with employees tax return for NJ. The last segment of my W-2 is all blank. I just want to make sure I'm filing the correct way.

Again, I've lived in PA all year and worked in NJ but, according to this W-2, it looks like no PA tax and I have to file in NJ.

Thanks in advance for help!