It's an IT-2104.1 form. You can provide it to your employer, but its not required with 0% work in NYS under the employer Withholding Guidelines.
Glad your employer made this easier for you on a going forward basis.
Kudos to @ErnieS0 for providing helpful advice on how to get through TurboTax - I would have struggled, given up, and paper filed ha-ha.
Kristine L. Bly, EA Private Client Services / Residency / Tax Controversy
Partner, Cohen & Company
