Tangible personal property used in research and development business . Access forms available from the Assessor's office, including benefits, business personal property, change in ownership, and other general forms.You must file a Personal Property form along with a current depreciation schedule with the Commissioner of Revenue no later than March 15 of each taxable year. To make a change of personal property, view and complete the Change of Personal Property Form. Just click on the link above it will download a PDF. Year, fill in the tax year space at the top of the form. Treasurer – Property Taxes.