Every accounting firm in the United States must register with the board of accountancy in the state where its professionals practice. However, similar to the CPA licensing process, the steps to registering a CPA firm vary from state to state. You can find information about how to register a CPA firm at that particular state board of accountancy website or you can use NASBA’s Accountancy Licensing Library (ALL), where you can find the information you need to register and manage multiple state firm registrations.