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The option indicating that SOA forms can be accessed through enrollment guides and sales material portals is correct because these resources are specifically designed to provide agents and brokers with the necessary documentation and tools to assist them in the enrollment process. These portals typically contain updated forms, guidelines, and reference materials that are essential for agents when working with clients. The availability of SOA forms in this setting ensures that agents have up-to-date information and resources readily accessible to facilitate seamless interactions with potential enrollees. In contrast, while online application portals, personal websites, and main offices may contain various types of information related to insurance products, they are not the primary or most efficient source for obtaining specific SOA forms, as these resources may focus more on the application itself or general company information rather than specific enrollment support materials.