Gov for a copy of the Business Personal Property 520 reporting form initially sent in January. The Business Personal Property Unit assists in the assessment of this type of property.Business personal property is personal property used in a business for commercial, industrial, residential, and agricultural purposes. Select from the list below to create a checklist pertinent to your particular business that will direct you to most of the business forms you may need. Maricopa sales tax details. Tackle complex global issues in a wide range of fulfilling career fields, from communication and sociology to history, economics, and beyond. Education. Alternatively, you can print the online form, fill it out and mail it in. Most business activities are taxable to Gilbert, the State of Arizona and Maricopa County. Some business activities are only taxable to Gilbert. For more information, check out the complete listing of Arizona LLC naming requirements.