15 May 2013
Income and TDS will always arise between 2 different entities, not in same entity. one entity cannot earn on its own, so TDS will not apply inter-department or branch works
16 May 2013
Basic Income tax applicability is One person earning income from others, no one can earn income from themselves. so no need to notification required to justify the basic concepts on income tax.
Its common that even inter unit sales transactions between two units are recognised as income by the respective units. But you knock of these transactions at company level during consolidation. So you need not confuse this as income chargeable to tax under income tax act. It is always between to persons and not otherwise.