My friend planning to start trading business in Bangalore.He plans to get TIN No.in the name A is the mother company he wants to introduce some more brands like B, C, and D in the name of A. He wants to rise bills in the name of A, B, C and D is it possible to do the business. Because he got registration in A only. How is possible to raise the bills in the name of B, C & D Please Clarify me.