That's a very strange question. On the Internet, of course. Where else can you find information? Or you can consult a firm that provides similar services. That way you will be sure of the correctness of the information
When I decided to start an llc I searched all the information on the Internet. It helped me, I found all the necessary information on documents and legislation in the states. But if you have doubts, you can always seek advice from professionals, they will check all the documents and help you apply.