Yes you would have to file a nonresident New York tax return to report the sale of the New York real estate. In TurboTax, you will be able to allocate the loss- follow the interview and please post if you have any questions.
You must file Form IT‑203 (Part Year Resident return) if you have income from a New York source* and your New York AGI (Federal amount column) is more than your New York State standard deduction.
*For nonresidents New York source income is the sum (with adjustments for special accruals) of income, gain, loss, and deduction from real or tangible personal property located in New York State.
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