Sorry for the late reply , and welcome to the site , do you want to remove the dash completely or just get access to some dash components
there are bolted 'brackets' on the bottom of the dash accessed from underneath the metal dash rail and there are plastic 'clips' on the top of the wood dash remove these and the dash will pop out , be careful with the brackets as its possible to pull them away from the wood dash if you are not careful , make sure you disconnect the battery as there are lots of electrical components active in there , best advice I can give you is if you want to do some 'light' maintenance etc on your mini is to get yourself a Haynes manual all the basic and some tech stuff is in there . and of course feel free to pop in here anytime .
G