If you have abandoned your domicile in NY, and you plan to live in Massachusetts and not return to NY, two things you can do to substantiate your change of domicile are to obtain a Massachusetts drivers license and register to vote in MA. If you own a car, you should change its registration to MA.
Once you establish MA as your domicile, NY can tax you only on NY-source income.
New York Source Income of Nonresident Individuals, Estates, and Trusts, and Part-Year Resident Indiv...
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
