Entry should be as here under-
Invoice raised of Rs. 1,00,000/- and IGST applicable 5% entry should be books as bekow-
Party.................Dr 1,00,000
To Exports 1,00,000
IGST Receivable .................Dr. 5,000
To IGST Payable............... 5,000
On payment receipt of IGST-
Bank......................Dr 5,000
To IGST Receivable 5,000
Because IGST is not liability of foreign debtors so why we debit to the debtors for the same so we should passed a separate entry of IGST Receivable.