GCSE kicked out of School / offsite help!!! Watch

So I'm a year 11 boy and got taken out of mainstream education because of my behaviour in early January and reffered to an AP (alternative provision ) and have been told that I will be sitting my GCSE's there. The poblem is the school have not entered me for GCSE's yet as i am doing a mixture of exam boards from THEIR curriculum and from my original school and they are very disorganised . I would like to know the deadline for entering students for exams Because i am genuinely confused and stressed out. pls help