Solution : https://service.sap.com/sap/support/notes/673222 (SAP Service marketplace login required)
Key words : 
ipc installation directory/lib/userexits folder, refer vertex/taxware documentation, pricing procedure customizing passes, pricing customizing offers subtotals 1-6, user data field user_data, ipc installation guide, //              call formula 300          return pricingdocument, //    fill freight amount     pricingitem, //    fill gross amount      pricingitem, vertex/taxware/sabrix
Related Notes : 
       
| 942309 | Tax interface: Sending additional fields (formula 300) | 
| 942308 | Tax interface: Sending additional fields (formula 500) | 
| 692652 | Tax interface: Sending additional fields (formula 500, 501) | 
| 586939 | External Tax Calculation | 
| 486061 | How to get patches for CRM Internet Pricing Configurator |