Checkout Text

On the final orders and in the email, the system is referring to our sales tax as VAT.
I have only one Tax set-up and that's for the state of Texas. How do I get the system to use "Sales Tax" or "Tax" instead of "VAT".
Also, is it possible to disable the showing on the order of both "Total with VAT" and "Total without VAT".
I personally would prefer to have it just show the product total, coupon value (if any), tax, shipping, total.
Let me know where to go fix this "VAT" vs "TAX" issue, and any other advice that may help.
Thanks, Bill