Who must obtain a seller's permit? What does engaged in business mean?If you will be selling items at a location for less than 90 days, you are considered a temporary seller, and are required to hold a temporary seller's permit. Any person who conducts business in or is based from the unincorporated area of the County of Alameda must obtain a Business License. This section provides information to help you get started. Click through the steps above for a complete guide to starting a business in Alameda. Page with information about business licenses a new license in Alameda County, including information regarding unincorporated areas and renewing licenses. This tax does not all go to the state, though. Of Motor Vehicles are not subject to business personal property tax. Our guide will help you clear your confusion.