My wife is Colombian and I want to apply for her Adjustment of Status. Do I need to apply for her daughter (my stepchild) at the same time or can I wait to apply and do it later?

When you file for the adjustment of status your wife’s children (under the age of 21) also qualify for the same preference and priority date.

You are able to file later for the stepchild but weary of the various age requirements and the time it takes to process the application. Your stepchild, as long as they were under 18 when you were married will be considered “immediate relatives” and are eligible for the green card as soon as you get through the application process.