That makes sense, but looking at the NY state tax website, it seems as though one would have to file an IT-203-B after establishing residency - and the IT-203-B determines NYS taxable income on the basis of total days worked in New York divided by total days worked at company. In TurboTax however, there is an option to create a percentage, which could be used to break this down to income for each specific month in each state. Would a supplemental form be needed to show how the percentage was calculated? Where can one see the option to do this on the NY state website?
