Search tax forms and instructions. Exemption applications must be filed with your local assessor's office.See our Municipal Profiles for your local assessor's mailing address. Pay a Bill, Tax, Fine or Service. Need to make a payment? A single personal property assessment is made for all taxable personal property of the owner located in the city or town. 2. Taxpayers should use these forms and guides to apply for local tax abatements and exemptions and file property returns. The Office of the Receiver of Taxes welcomes you to the Town of Smithtown's On-line Tax Lookup and Payment System. Learn more about personal property tax. We do not make the tax rates; we only collect them.