Information about Form 1128, Application to Adopt, Change or Retain a Tax Year, including recent updates, related forms, and instructions on how to file. Form 1128 is used to request a change in tax year, and to adopt or retain a certain tax year (partnerships, S corporations, or personal service corporations).
Information about Form 3115, Application for Change in Accounting Method, including recent updates, related forms and instructions on how to file.
Information about Publication 509, Tax Calendars, including recent updates and related forms. Publication 509 contains 3 tax calendars: general, employer, and excise. They explain when to file, pay, and take other actions required by federal tax laws.
Publication 535 discusses common business expenses and explains what is and is not deductible. This publication discusses common business expenses and explains what is and is not deductible. The chapters cover general rules for deducting business expenses and specific expenses.
Publication 537 discusses the general rules that apply to all installment sales (those with one or more payments after the year of the sale). It discusses more complex rules when certain conditions exist or certain types of property are sold. This publication discusses the general rules that apply to using the installment method and more complex rules when certain conditions exist or certain types of property are sold.
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 946 explains how you can recover the cost of business or income-producing property through deductions for depreciation.