Ok so here is my need for a site I am developing for a client. He has a product that is sold commercially (taxed for local Washington state customers) and also available for non-profit organizations & military base sales where sales tax will not be collected for local sales.

My question is if there is a way when a coupon code is used (for the base sales and non-profit sales) that Zencart would apply the free shipping and also eliminate the sales tax if it would have otherwise been a taxed sale (local WA state)?

Does anyone know of an add on or another way this can be done automatically and not something needed to be done after a customer registers and/or checks out (such as group pricing or a couple mods I have seen that allow you to add a customer to a tax exempt category)?

I am running version 1.3.8a, with easy populate and image handler installed.

Thanks in advance,

Jesse