Thanks but the above scenario is not helpful in "Bill to Ship to" case, when doing this transaction the GST  (SGS/ CGST or IGST) is identified basis on the billing location or GSTIN however quickbooks considers the shipping location for the same and removes IGST option in above case from Tax column. Example - PO received from Gujrat to party in U.P. for delivery in U.P. ---- Billing done to Gujrat and delivery in U.P. should be charged at IGST however you will not get option of applying IGST on this billing IGST.

Please let me know.

Thanks.