You're correct, NY Form IT2 is only for W2's.
If you want to report your 1099-NEC income as Other Income and not as self-employment income, make sure that it appears on Schedule 1, Line 8z of your federal return and not on Schedule C. You want your federal and NYS returns to be consistent with each other.
NY requires that self-employed individuals submit a copy of their 1099-NEC with their tax return. I can't find a corresponding instruction for those reporting the 1099-NEC as "Other Income."
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
