Have you applied yet? If you have applied and done it by post, then you will need to wait. If you have not applied, it is not clear what your question is.
Have you been issued with a COS yet? Why the urgency to apply so soon?
Char (CR001 not Casa)
In life you cannot press the Backspace button!!
Please DO NOT send me a PM for immigration advice. I reserve the right to ignore the PM and not respond.