Apologies for an incomplete answer - I was leaving the house. Maybe I didn't fully understand what you said.
Yes, EIN is the same. This year, I have both NJ and NY income from the same employer but before my desk was moved to NJ all 100% of my income was from NY and they still gave me two W-2s with the NY version being empty outside of boxes 15-17.
I don't make any choices as to which form to list - the software does. I could manually delete the W-2 for NY but then I have nowhere to report the taxes withheld by NY. I could delete both and enter manually but then you are suggesting that Turbo Tax will let me enter second line for boxes 15-17 and this will fix the problem.
I looked at the existing main (NJ) W-2 and it actually does show two lines - one for each state, so I guess I need not do anything manually because it was imported correctly. Then I wasn't sure why I needed the second W-2 at all so I tried to delete it. My federal return was no affected but - inexplicably - I ended up with a large liability to NJ instead of large return before. So that didn't work either.
