iExpense - How to calculateTax Code based on Exp Type and Location

Hello

I have a requirement in iExpense to default the tax code based on the expense type and the location.

The tax code should be calculated using the expense type and the place of purchase (Location field), as a result, employees do not need to enter the sales tax line independently.

We are on 12.1.3 and I would appreciate any help on how to get this done.

Thanks

Len