Sales order Crystal report

Hi

I was wondering if anyone had the need to calculate sales tax at the sales
order acknowledgement.
We use this for verification of the order and the customer wants to see
sales tax included in the amount on the order.

I am on Vantage 4 going to 5.1 soon if you have already modified a report I
would be very interested.

Thank you
Don Kollmann
Heartland EPS