This document provides an overview of the accounting software Tally.ERP 9. It discusses the key features of Tally.ERP 9 such as unlimited accounting periods, top level security for companies, codeless accounting, and simultaneous operation of multiple companies. It also describes some of the facilities available in Tally.ERP 9 like data import/export, auditing, budgeting, and statutory/taxation features. Finally, it outlines how to perform various accounting tasks in Tally.ERP 9 like creating companies and ledgers, using accounting vouchers, and generating different reports.