When completing the form you must: • List all assets you own or control as of January 1, including those assets fully depreciated in your. The purpose of this overview is to present methods that assessing officers can use to achieve uniform and equitable personal property valuations.The Washington Department of Revenue (DOR) requires property taxes be applied to real property and business personal property (business assets). Gov or 206-296-5126. When completing the form you must: 1. Visit the District's new online tax portal to view and pay your taxes. Sign up for reminders. Business Personal Property Forms. If you have more than one business location, please file a consolidated return with a separate schedule for each location. 2. Personal property in Washington is subject to property tax just like real property.