IGST Calculation

Raj (Owner) (21 Points)

28 April 2017  
Scenario
HSN Code... 8402 01 01
CGST Rate 9 %
SGST Rate in Maharashtra 9 %
SGST Rate in Gujarat 11 %

If the Seller is in Maharashtra and Buyer in Gujarat, place of supply of Goods is Gujarat.

What would be the IGST rate...
is it 18% ( CGST + Mah SGST)
or 20 % (CGST + Guj SGST)
or independent rate notified by Govt for IGST for that HSN which will be uniform across the country.