The list of codes you're looking for - Subtraction Modifications - starts on page 5 of this document (linked to instructions page); if you're preparing your personal tax return, you want to look at the column IT-201 to see which codes in the first column are applicable to your tax return (or the Nonresident column). Keep scrolling down because there are multiple pages of subtraction mods.
Additional note-
IT-203 column for Nonresident return
IT-204 column for Partnership return
IT-205 column for Estate/Trust return
See also: Instructions for NYS-DTF Form IT-201 Full-Year Resident Income Tax Return
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