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.
Information about Publication 544, Sales and Other Dispositions of Assets, including recent updates and related forms. Publication 544 explains the tax rules that apply when you dispose of property. It discusses how to figure gain (loss), whether it is ordinary or capital, how to treat the gain or loss, and how to report gains and losses.