No - If you reside in Yonkers, you are not a NYC resident and are not required to pay NYC taxes. You will need to file Yonkers income tax surcharge on your NY resident state income tax return.

You must report your Yonkers resident income tax surcharge on your state return if you:

• were a Yonkers resident for the tax year, and
• have to file a New York State return.

Please click this link for more information - NYC and Yonkers residents