Clarity against IGST

MOHAMED AZGAR (Tax PRACTITIONERS ) (130 Points)

29 July 2017  
I am a registered dealer in Tamilnadu. our supplied conmodites are "Boiler components ". One purchase order (POS) received from BHEL, TIRUCHY. The ordered components are supplied to Bangalore, Karnataka State as per instruction of BHEL people.
I have tax invoice raised to BHEL Tiruchy and noted the consignee address also in Invoice.

Query:
If i am collect either CGST or IGST in our tax invoice? pls tell me with clarity.

Thank u brothers.