This document provides an implementation guide for Oracle E-Business Tax Release 12.1. It is intended to help users understand the Oracle E-Business Tax solution, set up the necessary applications and configurations, manage migrated tax data, and set up country-specific taxes for locations like the United Kingdom, Canada, and the United States. The guide contains information over four chapters and covers topics such as analyzing tax requirements, setting up users, legal entities, accounts, and more. It aims to help users successfully implement the Oracle E-Business Tax product.