How to get rid of excess fat/skin?

I have lost some weight, I wasn't really really fat I just was chunky like had a round belly. After I lost weight I am starting to notice a six pack line on my stomach, but I have like skin or fat or something covering it and I want to know how to lose it and be able to see my six pack. I have done some research and learn that it it possible to have a six-pack even without seeing it. Like alot of people have six packs but there fat is covering it. So I was just wondering if anyone can please tell me how to get rid of that fat, or "excess fat/skin" idk what it's really called. Thank you