An income tax forms book, usually referred to as the instructions booklet, is an IRS publication that provides information and instructions on individual tax forms. Tax forms and instructions are available online, or people can order them by calling the Internal Revenue Service.
The income tax form book provides line-by-line instructions with examples. It provides detailed schedule worksheets to determine eligibility for tax credits, such as dependents who qualify for tax credits and exemptions, as well as other resources. The booklet provides tips for users, and also cautions on additional forms or rules that may pertain to certain situations.