Tax classification Indi for Excise Condition

Hi,

I am using TAXINN procedure and will be maintaining excise duty rates for excise duty condition with VK11 in SD. Now as we know we have provision to maintain various forms (such as Form C, Form I for deemed export, Form H for export) as customer tax classification indicator in OVK1/ OVK2 settings. I wanted to use tax class. indi. as H (export customer) for excise duty condition JEXP and maintain zero excise duty rate for it so that at least I can track form.

Now, in standard SAP, JEXP is a discount and surcharge condition. Tax class. Indi. can be added in OVK3 only if condition's class is 'Tax'. How can I achieve this functionality ? I checked the use of Excise indicator for Customer in J1ID but it is not available at sales order pricing level.

thanks

Mandar