If you don’t yet have an account, you may find your USCIS online account number in the top left of your receipt notice under “USCIS Online Account Number. Or you may need to first input the “Online Access Code” in the upper right to create an account. After you create a myUSCIS account, you may locate your account number on your profile page. If you don’t see a profile page, search any downloadable documents related to your application for a copy of your receipt notice or other documents referring to account creation. If you’re still unsuccessful at locating the number, you may contact USCIS customer service.