When the "Foreign Transaction Tax Excluded" on the Merchant Facility is ticked/selected, the Tax Amount on the Payment Txn is ONLY assigned when the "Default Country" on the Merchant Facility matches the Country on the Payment Txn.

For Example for when the "Foreign Transaction Tax Excluded" is selected on the Merchant Facility:

• If the Default Country on the Merchant Facility is "Australia" and the Country on the "Payment Txn" is also "Australia" the Tax Amount is calculated.
• If the Default Country on the Merchant Facility is blank, or "New Zealand" and the Country on the "Payment Txn" is "Australia" the Tax Amount is NOT calculated.

If you would like to have Tax calculated and not be dependent on country then untick the "Foreign Transaction Tax Excluded" on the Merchant Facility.

Also see the How to Calculate Tax guide for more information on Tax.