Don't know as these people who left the "CITY" in the spring would still be "part-year" residents of NYC and full residents of NY State. When I do tax returns for NY wage W2s, there is a checkbox for NYC and Yonkers residents. If they are not resident there then generally their "Local" withholdings are the tax payment to the NYC, however if they are residents then I think it increases the NY State amount due.
This year, boy is that residency fight going to be a knock-down FIGHT! It was bad enough when residents fled to Florida like Rush BUT a whole community of WEALTH outside those magical boundaries, WOW!
It is not just NYC. There are 90K NH residents that used to commute into Mass for work. At least half of them are not driving into MA anymore. Therefore, they should not be paying income tax to MA.
This is happening all over the country. Anywhere there is a major metro area close to a state line. It is going to be a major fight between state and local governments.