I am curious if this is possible as well. From what I've gathered, Activation lock support can take between 10 and 30 days to return a follow up message. The more information you provide, the quicker they may respond. There is no way to modify your submission after the request has been made.
It would probably be a good idea to wait for the follow up email that is on it's way, then reply with the updates you have. I would avoid calling apple support. I wish I could find the thread, but I recall reading one saying the phone support is different from the department that handles activation locks.