In this book you will find all the information you need about the form, from how it works to optimizing it to avoid owing the IRS. In addition, we include little known W4 facts, such as what can happen with your withholding if you owe year after year and the impact it has upon your financial future. This information is important for those that currently owe the IRS. A must read for those seeking to increase their refund or their knowledge about federal income tax withholding.