Kolombica Fledging is when the baby birds leave the nest for the first time on their own. With Societies, this is at about 19-25 days after hatching. Once they have fledged, they will spend most of their time out of the nest, but they will return at night to sleep. They will continue to beg from the parents until they are weaned. Weaned means they no longer need food from their parents, they are able to eat and drink on their own, and with Societies, this is about 4-5 weeks of age.
People have different times when they remove the nest. The parents could start another clutch soon after the first clutch has fledged. I like to leave a nest until the babies are weaned at least, but I am prepared to toss any additional eggs that are laid that I do not want.
A belated welcome to the forum! There's lots of good reading at
www.finchinfo.com, where you will find many articles on finch care, including articles on the Society finch and on breeding. If you put your general location in your profile, it makes it easier to answer questions later on.