When completing the form you must: • List all assets you own or control as of January 1, including those assets fully depreciated in your. Personal property tax is due on most property used in conducting business.When completing the form you must: 1. In Washington State, personal property refers to assets used in conducting a business, other than real estate. Personal property tax is due April 30th. Complete the new business setup form (206KB). Business owners operating a business in Kitsap County must report their assets to the Kitsap County Assessor. Instructions for completing the paper listing form are on the form itself and can also be accessed on the Skagit County Assessor website. Effective with the 2020 FP-31 return, booklets will no longer be printed or mailed. You must file and pay electronically through MyTax.DC.gov.