What tax should I associate with an invoice if the items in the invoice are being exported?

If the items in the invoice are being exported, you can associate a zero tax for the invoice. After you create the invoice, you have to create a Shipping Bill to record the customs duty and IGST paid for the items.

To create a shipping bill:

• Go to Sales on the left sidebar and select Invoices.
• Select the invoice for which you have to create a shipping bill.
• Click the More icon and select Create Shipping Bill.
• In the shipping bill creation page, enter the details of the shipping bill, custom duty charges and other additional charges that you have incurred for that transaction.
• Click Save.