@Mike9241 Is correct. Income taxed by NY would have to be also taxed using IL income definition to be eligible for credit. As NY has convenience of the employer rule and taxes based on that and IL would not tax that income using it’s rules you will be basically double taxed and not eligible for this credit. One way out of it is for the employer to create a bonafide office for you, stop NY withholding and withhold just IL taxes.
