IGST OR CGST

kartick singh (4 Points)

28 August 2017  
if a registered inter state party purchase goods and collect the goods from their shop on cash basis then what tax should we charge IGST OR LOCAL TAX...
for example a party from bihar come to west bengal and purchase goods from west bengal and INVOCIE is made to bihar gst no but he collect the goods from their shop then what tax would we charge... pls advice