Canadian Tax - IExpense

We have a situation where an employee from Alberta (AB) travels to another jurisdiction.

Under the CA_AB tax jurisdiction, we have configured GST tax @ 5%. as the standard. When then employee is traveling to another province, they incur an expense with HST15%. We have a tax classification code under CA_HST tax for 15% setup with no jurisdiction.

Iexpense interfaces the 15% tax classification code to AP. However AP defaults the "Tax" based on the employee location to CA_GST and since the 15% is not under CA_GST, but under CA_HST the system doesnt over-ride the tax rate on the AP invoice.