Ok, let see this scenario.
You are an online English teacher & you are teaching a student online. The student got some technical issue & you need to wait for a while until he fixes his problem. You then say "I go back to you later" or "I come back to you later".
Some people say "I go back to you later" and others say "I come back to you later".
I think the correct saying is "I go back to you later" because the speaker will move far away his position.
Is that correct?
Best Answer
Normally you would say:
if you are staying on the connection (internet or phone).
If you will drop the connection to resume later on, then:
This also works in personal communication. Let's say you ask your professor something, but he needs to speak to another student first. He might say to you:
When he does, let's say he needs to do some research back at his office before he can answer. In that case:
Some people might use "later on", but it is unnecessary.