Hello Siddik. From the UK government: How to set up a charity on https://www.gov.uk/running-charity/se... (and it wouldn't be the UK it wasn't different in Scotland: http://www.oscr.org.uk/about-scottish...)
NCVO has also produced useful How-to guides: http://knowhownonprofit.org/basics/se...
If you are a social enterprise then it can be different but the Government guide has lots of links to that effect.
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