Lived in 4 months in NYC, moved to New Jersey for rest of year but worked the whole year in NYC. How do you handle residency, duplicate wages and double-tax?

Let's assume 

Here are the facts 

  • Assuming my income was 90K in 2018
  • I worked in NYC the whole 2018
  • I lived in NYC for the first 4 months of the year and made 30K during that period based on my W2
  • I live in NJ for the next 8 months of the year and made 60k during that period based on my W2
  • I selected Part-Year Resident on NYS Resident Status with 30K income allocation
  • I selected Part-Year Resident on NYC Resident Status with 30K income allocation

The confusion comes when completing my NJ taxes.

It first asks me to remove duplicate wages. Which one should I remove?

1. NJ 60,000

2. NY 90,000

It then asks me to work Credit for Taxes Paid to Another State. I enter New York City as the jurisdiction where I worked.  Now it asks me to enter the "Double-Taxed Income" and the "Tax paid to New York City"

I don't know what to enter here. Can someone help me?