Taxpayers should use these forms and guides to apply for local tax abatements and exemptions and file property returns. - This form is filed when there are 5 or more full or partial calendar days of disability, and they do not need to be consecutive.You have three options. NOTE: You must use Form 103 – Long if: a. You are a manufacturer or processor; b. Personal Property Tax. Questions regarding personal property valuation or abatement requests can be directed to the Assessor's Office at (978) 671-0971. Who must file Form ST-1? You must file Form ST-1, Sales and Use Tax and E911 Surcharge Return, if you are making retail sales, including leases or. Form 103, also known as "Insurer's Notification of Payment," is a crucial document that facilitates open dialogue and compliance with state insurance laws.