In Manhattan, parking tax is 18.375%. The exemption lowers the amount of tax by 8%, reducing the amount of tax you have to pay to 10.375%.
To be eligible for the exemption, your vehicle must be registered at your primary residence in Manhattan and the vehicle must be for personal use only.
You can find additional information and/or apply for the Manhattan Resident tax exemption by visiting: https://www1.nyc.gov/site/finance/benefits/vehicles-manhattan-resident-parking-tax-exemption.page