Complete the section on page two of the declaration "Affidavit of Business Closing or Sale of Business" and tell us what happened to the property. All owners of business personal property are required to annually file a personal property declaration with the Assessor no later than November 1 st.You may now file your business registration online using this web form (Click "Next" below). All businesses are required to file annually a Declaration of Personal Property that lists the assets' original cost. Click on the individual exemption below to learn how to file. Business personal property deals with the physical assets used in the operation of the business. Complete Form PTAX-203-B, Illinois Real Estate Transfer Declaration Supplemental Form B. 11 Full actual consideration. The top portion of the listing form is for basic information about your business. Complete Form PTAX-203-B, Illinois Real Estate Transfer Declaration Supplemental Form B. 11 Full actual consideration. A single return must be filed for each site in the county where the owner of tangible personal property transacts business.