There are mainly 7 requirements for an E-1 visa.
The requirements for an E-1 visa are extensive and it is important to seek advice from a certified U.S. immigration attorney and an immigration business planner to prepare the needed supporting evidence. This will increase your chances for approval from the Department of State (DOS) consular officer if you are outside of the United States, or the United States Citizenship and Immigration Services (USCIS) if you are in a nonimmigrant visa status in the United States.