When is the earliest I could top?

I have this single grow low profile box in my room and I need to get my plant to be kinda short. I'm using street bag seeds so nothing special. When do you all think that I could top it as soon as possible. Maybe after its on its 3rd or 4th link?

Usually when it's got around 5-6 nodes. I would suggest heading to the advanced cultivation forum and reading uncle bens topping guide.

Good luck.

You can top anytime as long as there are branches below your cut.

Alright thanks for the help. I will be sure to check those out.