Income tax return cooperative housing society

Cooperative Housing Societies have to file their IT returns in Form 5...bt in this form..maintainence charges collected and such other collections from members...should be taken in the profit n loss account or should be taken under exemptions based on the concept of mutuality. Also if such income is taken under exemption den der is no scope of any expenses being claimed against it..but if taken in profit n loss account..whether excess of such income over the expenses of the society is chargeable to tax...n if yes..then whether under business n profession...????