Information about Publication 526, Charitable Contributions, including recent updates. Publication 526 explains how to claim a deduction for charitable contributions.
Publication 538 explains some of the rules for accounting periods and accounting methods. It is not intended as a guide to general business and tax accounting rules.
Publication 542 discusses the general tax laws that apply to ordinary domestic corporations.
Publication 947 discusses who can represent a taxpayer before IRS and what forms or documents are used to authorize a representative. Usually, attorneys, CPAs, enrolled agents, and enrolled actuaries can represent taxpayers before IRS. This publication discusses who can represent a taxpayer before the IRS and what forms or documents are used to authorize a representative.