All owners of taxable personal property are required, annually, to file a Personal Property Declaration Form M-15. If I move out of Middlesex County or sell an item of personal property, will my tax bill be prorated?Middlesex County does not prorate personal property. E. Tangible personal property for resale that will be resold from a business located outside New York State. Property Tax Reimbursement Forms (PTR) May Be Filled Out on the Following Days and Times. Taxpayers should use these forms and guides to apply for local tax abatements and exemptions and file property returns. § 375-6 Application of exemption.