All businesses that want to contract with the City must register with iSupplier, to receive bid notifications, to apply for local business certification. Please include in your email the RFQ number and your company name.Welcome to the Small Local Emerging Business (SLEB) online registration system for local suppliers. Please register only once per local Alameda County business. Once you get to the iSupplier Portal, click on the Government Tab. To respond to open opportunities, please register as a vendor at our Procurement Portal. For more information on registration, you may reference this article. As noted in the first chapter, Obtaining a Seller's Permit, retail sales of tangible personal property in. California are generally subject to sales tax. How do I fill this out?