payment of IGST & refund of IGST of Exports

Shinoj Davis (112 Points)

24 August 2017  
when we should pay IGST on exports , at the time of shipment or at the time of monthly return payment time , if we include IGST in the invoice?..

If we paid the IGST at the of shipment with basic customs duty , when we get refund ?. , After monthly return filing of that month ?.

Could you please give me clarity for the above situations ...

Thank you