The new application period for the Wintersemester 2014/15 starts on the 2nd of June 2014, it ends on the 31st of July.
You can find the forms here
The office hours during the application period are as follows:
Monday and Friday: 12:00 – 15:30
Wednesday 12:00 – 19:00
Thursday: 10:45-15:00 (Adlershof only!)