@federicotorre
I don’t have time to research this fully, and I moved out of New York two years ago so I don’t have the New York tax module installed on my computer to test. Here are the instructions for itemized deductions in New York. I would start by reading through the instructions and seeing if there are any allocation rules that you use when you file the part your resident tax return, which is form IT-203.
https://www.tax.ny.gov/pdf/current_forms/it/it196i.pdf
I saw at least one place where it said that if you are using form IT-203, you do something different than if you are using form IT-201, but I don’t have time to study it right now.
