Thanks @RaifH , I believe the majority of the amount reported in NJ is taxable federally, so I can't add them together when prepping NJ return, otherwise the taxable income is MUCH higher than what I actually earned. I did go through my pay stubs for 2021, looks like company switched my earnings from taxable in NY to taxable in NJ in October. So my taxable wages in NY stopped increasing after Oct, and that's when my taxable wage in NJ started to accumulate.
What I did on the remove duplicate page when prepping NJ return, is to remove the NJ line and only select the NY wages (since it's much closer to the federal taxable income). Now I'm facing issues with figuring out the additional amounts I need to report on the page that follows. Doesn't look like the number can be found on my W-2 easily. Can I do this to get the additional amounts: Taxable wages in NJ (amount on W2 Box 16 for NJ matches the amount on my final paystub) + Taxable wages in NY (in my final pay stub) - BOX 1
