2nd quarter taxes are due 5/1/23, grace period to 5/10/23. Mail your payments to City of Clifton – Tax Dept., 900 Clifton Avenue, Clifton, NJ 07013, insert your payment in our drop box 24/7, come into City Hall between 8:15 through 4:15, Monday through Friday, or pay online and click on the online payment icon above.