Depot Sales order price

Hi Experts ,

Here in my client v r doin depot sales process.During billing the tax rates are picked frm the procurement due to the calculation type 356 that v use in pricing.But my client asking that at the time of creating order the taxes are calculated based upon the rates maintained in the tax code and says that its misleading.but the actual taxes are picked at the time of invoice only.so could some one guide on this.

Regards

Lena