E-feil both. When you efile, there is form you need to fill out online. There is a question asking about where you sent your I-485. You will not get through if there is mistake.
After you complete online filing, you need to call 1-800 CIS National Service Center (it will tell you online) to make an appointment with your local CIS. The representative will tell you where to go.
After you complete online filing, you need to call 1-800 CIS National Service Center (it will tell you online) to make an appointment with your local CIS. The representative will tell you where to go.