Who Must File a Personal Property Declaration with the Assessor? The BPP Portal is closed until 2025.Search tax forms and instructions. The Tax Collector's Office is responsible for collecting Real Estate taxes for all properties in Clark Township. Request to have personal property taxes billed in installments. This form can be printed from PDF format. Commonly Requested Forms The Assessor's Office makes a number of forms available to property owners and taxpayers to manage their property. All tax bills are mailed 20 to 25 days before the due date. File the return between January 1 and May 15. Do not enclose the tangible return with the income tax return.