Billing document tax code display

Dear All,

I have an issue with regards to tax code....

Exactly what is happening….

I created a sales order and saved it. When I go to line item (conditions tab), tax code is not existed for ZBAS & ZINS condition type. Subsequently, I created delivery and billing with reference to delivery document.

Before saving billing document, I couldn’t find any tax code existed for ZBAS& ZINS condition type. 

But, once it is saved, then ZBAS& ZINS condition type is copying the tax code either from JVAT or JCST.

Here is the screen shot for your reference...

Thanks & Regards

Vidya Sagar