About the only way to see would be to print out yoru NY tax returns, with all forms and worksheets, to see what's being included.
Unless you can identify some particular item that amounts to ~$17k-$18k
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another thought.
.. senior/aged & retired? SS and some 1099-R $$ are exempted from NY taxation (I don't know if your NY summary would just add those to your deduction levels, or show them separately).
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
