Work in NY, Live in PA, but some income is taxed using prior year's withholdings when working in NJ
For 2021, I work in NY and live in Philadelphia, PA. Employer does not take out taxes for PA. I am filing as a non-resident of NY, and getting a credit on my resident PA return for the NY taxes I paid.
The confusing part is how to handle filing for NJ.
On my W-2 for 2021, I also have wages of $13,500 earned in NJ, and $945 of NJ state taxes paid. This is because I never worked in NJ in 2021. However, my employer made a one time payment in 2021 and withheld taxes based on the prior year's (2020) withholding info. (I guess this is because the money is attributed to 2020.) In other words, in 2020, I worked for the same employer part time in both NY and NJ, while living in PA full time).
Does PA consider the $13K as part of my taxable income. If so, do I get a credit for it? Or should I expect to get a full refund of $945 from NJ, and also include the $13K as part of my taxable income?