Tax based on Plant location

Hi,

I am having a problem regarding the way SAP is calculating taxes. The scenario is as follows -

There is a sales order with 'DIEN' material which has a customer (Ship To ) from Texas.

Plant at the line item level is located in Louisiana.

The system is calculating taxes based on the ship to location i.e. Texas and picking up the Texas tax jurisdiction code.

The requirement is that, if services are performed in Louisiana i.e. the plant at line item is located in Louisiana, no matter what the customer location is, system should always pick Louisiana jurisdiction code.

Anyone came across this kind of requirement before??

Any help will be appreciated

Regards,

Shantanu