Does the deadline only apply to when you submit your application?

So the school I realized I kind of overlooked just extended their deadline to February 1st. I can easily send in my application on common app right now, but I’m worried about the rest of my information including transcripts, recommendation letters, and sat score,) which would be sent by late February. So, would that invalidate my application or is the February first deadline more about the time you send in your application by?

For most (but not all, so check with the school), the deadline applies to the applications and any supplements that you have to send. Anything outside of your control will generally be given a short grace period.