Tally.ERP 9 is accounting software that allows users to automate business operations like sales, finance, purchasing, inventory and manufacturing. It has features like simplicity, speed, power, flexibility, scalability, multi-lingual capability, and remote access. Users can install Tally.ERP 9, create a new company, set the financial year and books beginning date, take backups of company data, split financial years, and import or export data to other formats like Excel.