This publication offers guidance to revenue agencies that are in the process of designing or implementing computerization or information technology projects to improve the efficiency of their tax administration. It draws on the experience of Australia, Malaysia, Malta, Pakistan, Singapore, and Tanzania, representing a range of information technology initiatives of varying scales, complexity, and levels of maturity. ather than look at overall conceptual issues, which are already well covered elsewhere, this book looks at the finer details of implementation in order to identify lessons, ideas, and opportunities, both at the planning and design phase, and during implementation and review and evaluation.