How to make sure tax code gets carried over from expense report to the invoice in Oracle 11.5.10?

We are using Oracle 11.5.10.2. We just configured Internet Expenses for Argentina and have come across an issue with the tax set up. Our issue is that we have created new tax rates in the Payables responsibility (we have enabled the Internet Expenses check box when defining this new rate) and have assigned these rates to items in the Expense Templates. But, when I create an expense report and it is imported into Payables, the expense report does not populate with the tax code that we configured in the expense template. The tax code also does not show up on