Application and sat?

<p>When I looked at the collegeboard website to check out application deadlines, I noticed that most schools have regular app deadline on january 1. But it also contains deadlines for sat test scores which is around march. Does that mean I can take my sat as late as Jan or even February? (I'm a senior in high school) I thought the application had to have the sat scores with it.... Why does it have two separate dates?</p>