Additional place

Suppose 

1. Principal place is at Mumbai and 4 additional places are in four different states in India.

2. Principal place and additional places are both in the same state but at different  PIN codes

May need frame your question with  more details. You are asking about issuing Invoice or way bills or anything else?

If you have multiple places of business in Same state, Any of the places can be mentioned as Bill to place. The GSTIN remains the same. Only the address would differ, and that's ok.

@ DIP NARAYAN

1. HAS TO RAISE TAX INVOICE (INTERSTATE , OFFOCOURSE THE GSTN WILL BE DIFFERENT)

2.HAS TO RAISE DELIVERY CHALLAN (WITH IN STATE, GSTN IS SAME)