Multiple College Deadlines

If all the colleges I’m applying to with the Common App have different deadlines, do I still have to submit them at the same time? Because I’m almost done with the app that has an earlier deadline, but since the other ones aren’t done, I don’t know if I can.

I’m not following. Each college has a different deadline. When you submit, you submit individually. Just make sure everything, including the supplement SA to that college is submitted by their deadline date. If it’s not submitted by the deadline date than it’s incomplete.