If you are a member of a public employee retirement system (such as the NYS and Local Retirement System) and made 414(h) retirement contributions to your retirement plan, then you must report the contributions as an addition modification to your recomputed federal adjusted gross income (AGI) on your New York State income tax return.
This addition modification is reported on line 21 on Form IT-201, Resident Income Tax Return; or line 21 of Form IT-203, Nonresident and Part-Year Resident Income Tax Return.