Get your taxes done using TurboTax

@PatriciaV Wow this is so detailed and helpful. This is what I did to add the state tax withheld to Box-13 with code ZZ: I could not find the relevant interview questions. Instead I manually added it to the Form 1065 (TurboTax Forms), as shown in the following:

 I then can see this number shown up on Box-13 with code ZZ. During the Federal Individual return, I can input this number as NJ state tax withheld during the code ZZ interviews. I also saw this number reflected to my NJ-1040NR return.

I think I am able to follow everything you suggested except that I did not generate NJK-1. I used to be NJ resident and moved out two years ago. My LLC does not have any NJ resident partners, with no NJ sourced business income/loss (but I still have other NJ sourced individual income) , so I think I do not need to file NJK-1 anymore (and saved me $50 TurboTax charge for NJ K-1 filing).  Pls let me know if you have a different understanding on this later matter.

I can't thank you enough for your suggestions and help. It saved me a lot of time and worries.