What are steps to become a US citizen?

Step 1. Determine if you are already a U.S. citizen
Step 2. Determine if you are eligible to become a U.S. citizen
Step 3. Prepare your Form N-400, Application for Naturalization
Step 4. Submit your Form N-400 and pay your fees
Step 5. Go to your biometrics appointment, if applicable
Step 6. Complete the interview
Step 7. Receive a decision from USCIS on your Form N-400
Step 8. Receive a notice to take the Oath of Allegiance
Step 9. Take the Oath of Allegiance to the United States
Step 10. Understanding U.S. citizenship