(a)in the case of every individual or Hindu undivided family or association of persons or body of individuals, whether incorporated or not, or every artificial juridical person referred to in sub-clause (vii) of clause (31) of section 2 of the Income-tax Act, or co-operative society or firm or local authority, calculated at the rate of twelve per cent. of such "advance tax", where the total income exceeds one crore rupees;