Publication 538, Accounting Periods and Methods
This publication 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 544, Sales and Other Dispositions of Assets
This publication explains the tax rules that apply when you dispose of property.
Publication 946, How To Depreciate Property
This publication explains how you can recover the cost of business or income-producing property through deductions for depreciation.