<human>:  What are the legal requirements for starting a nonprofit?
<bot>: The first step in starting a nonprofit organization is to register with the state where the headquarters is located. This involves obtaining a Certificate of Incorporation, also known as Articles of Incorporation, from the Secretary of State and possibly registering with the state's tax authorities. Nonprofits must also obtain nonprofit tax identification numbers from the Internal Revenue Service, register with the state's charity regulator, and comply with other legal requirements depending on the state of incorporation.