Appears to be minor from the photo's. That location is not prone to cracking nor is the damage near a hole. I would knock this down, gently, with a mushroom set and a back rivet plate or bucking bar, file the edge gently and deburr.
If that edge has already been broken, which it appears it might have been, you may not be able to use the above technique. You could however use your edge tool again and roll over it, gently, until it is back into reasonable shape. You could also try a hand seamer, but be warned, they are not as easy to use as they seem (seam)ha!
Always approach sheet metal repairs with a gentle touch. Work them out a step at a time.