You will file as a part-year resident of NC and a part-year resident of NY. Your NY return will, however, include all of your 2016 income.
Even
if you were a resident of New York for 1 day, NY
uses your entire AGI to calculate your tax on NY income That is why your W-2 shows all your income as "NY".
It
isn't, however, as bad as it appears. They calculate what your New
York tax would have been if you earned everything in NY, but then prorate that tax based on how much of your income was
earned while a NY resident.
For
example, if the NY tax on your entire 2016 income was $10,000 but only 30% was
earned as a NY resident, your NY tax would be 30% of $10,000 = 3,000.
Why
do they do this? So they can tax your NY income
at the highest possible tax rate, based on your entire AGI.
