I'm on it.

"I'm on it" means "I will deal with this" or "I will handle this problem." You can use it in work situations:

A: Bobby, there's something wrong with the phone system. Can you look into that?

B: I'm on it!

"I'm on it" sounds helpful and positive. When you say this, it seems like you're in control and you've already started to fix the problem.

This phrase appears in these lessons: