It will provide details on type of input taxes in Purchasing, their types, usage and customization. This document will also provide you information about common problems and areas where you can look for their cause and their solutions. This document also talks about special cases and related notes.
Basics: Taxes in Purchasing
Tax code in the Purchase order (PO)
Tax calculation in the PO
Customizing for Taxes: FI (Financials)and MM-PUR (Material Management - Purchasing)(Summary)
Important Forms/Modules for Taxation
Typical problems and where to look