NY friends, need your help (individual)

[ILLMAS]

TP kid works/lives in NY, Manhattan to be exact and before entering the county and school district which I didn’t know, TP was getting a small refund.  After I obtained the county and district information, the refund turned into a balance due.  I understand NY taxes on where you live or work, however the TP didn’t have local tax withheld and is the reason they now have a balance due.  What form does the TP need to give to their employer for the proper taxes to be withheld?

 

thanks

[TaxCPANY]

New York Form IT-2104 enables one to customize NY State and City (and Yonkers, etc.) withholdings so as, for instance, to declare oneself subject to the NYC tax on resident employees.  ATX supports it.