Could you elaborate on the issue? It's difficult to assess what value you're referring to is incorrect.
The tax type (inclusive/exclusive) will only control whether the tax amount is displayed as apart of the total or not.
For example, I tested an order for a $1.00 package that is taxed exclusively at 10% for client #1 and taxed inclusively at 10% for client #2.
The tax rates in the examples below are configured as:
Clients in the US are charged 10% with a tax type of 'Exclusive'. Client #1 is in the US
Clients in the UK are charged 10% with a tax type of 'Inclusive'. Client #2 is in the UK
Client #1 (with exclusive tax) sees on the order checkout page:
Product Price $1.00
Subtotal $1.00
Tax (10%) $0.10
Total $1.00
After placing the order, an invoice is created and the client is charged $1.10. On the order complete page, the client sees:
Product Price $1.00
Subtotal $1.00
Tax (10%) $0.10
PAID $1.10
----
Client #2 (with inclusive tax) sees on the order checkout page:
Product Price $1.00
Subtotal $1.00
Tax (10%) $0.10
Total $1.10
After placing the order, an invoice is created and the client is charged $1.10. On the order complete page, the client sees:
Product Price $1.00
Subtotal $1.00
Tax (10%) $0.10
PAID $1.10
How do these examples I described differ for you? What value is incorrect and what do you expect it to be?