All formal business entities, including LLCs, are required to have a Registered Agent on file with the state at all times. The agent may be an individual or company with a physical address located in the state of incorporation. Agents must be available at all times during standard business hours (9 a.m. - 5 p.m. Monday – Friday). The role of a Registered Agent is to receive any and all of communications from the government to the business. The agent’s name and address must be disclosed as part of the company’s public record.
Filing a limited liability company separates your personal assets from those of your business. This prevents you from being financially responsible for debts and liabilities of your business. Even though members are still liable, that liability is limited to the extent of their investments in the business. If, for instance, your company is involved in a lawsuit, the assets of the LLC itself could be in jeopardy, while the personal assets of the members/owners would be protected.
A series LLC is a form of limited liability company that provides liability protection to multiple "series". Essentially, it's a master LLC with separate divisions, each protected and operating independently. As an entity, the series LLC is geared towards businesses where investors own multiple companies, with each series being protected from the debts and obligations of the other series. Currently, only several states support this option, including Delaware, Illinois, Iowa, Nevada, Oklahoma, Puerto Rico, Tennessee, Texas, and Utah.
On the other hand, if you are not responsible for its tax, then you should declare the equipment in Part III of the Business Property Statement (Equipment belonging to others). Where equipment is declared in Part III of the Business Property Statement, the Assessor will also send a Notice to File to the person reported as the equipment's actual owner.