Sending Recommendation Letters

<p>I am currently applying to UW-Madison and I was wondering when you are supposed to submit your letters of recommendation. Are you supposed to send them immediately after you apply, before you apply, or can you wait about a week after you apply? I am wondering because I have finished my application and do not know if I should send it until my letters of recommendation are completed or could i send it now and send my letters later?
Thanks</p>