Exemption applications must be filed with your local assessor's office. See our Municipal Profiles for your local assessor's mailing address.Application for Use of Suffolk County Property for Non-County Purposes, Application to use county property for non-county purposes. The conveyance of real property is exempt from the real estate transfer tax for the following reason: a. I certify that the organization named above holds a valid Form ST1 19, Exempt Organization Certificate, and is exempt. The application packets linked below include all relevant forms and instructions needed to apply for each type of exemption. The agent of the exempt 501(c)(3) organization must complete Part 2 of. 1 and 2 person household category for Suffolk. County. There are two exemptions available to those senior citizens that are or will be 65-years-old during the year that they are filing for the exemption. Remember the annual deadline to file for any of these exemptions is March 1st.