You are correct. In the Allocation screen, enter the New York income that matches your Illinois income. This is the amount that that box is asking for. This is the amount that you earned while an Illinois resident as a nonresident of New York, which New York is taxing. This is how TurboTax will calculate your credit. I am editing my answer to accurately convey this information.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
