To Select Company
Open Tally 9.ERP Software --> Getway of Tally --> Press Alt+F3 --> Company Information --> Select the Company Name --> Ok

To Shut Company
Open Tally 9.ERP Software --> Getway of Tally --> Press Alt+F3 --> Company Information --> Select the Shut Company Name --> Ok

To Open Company
Open Tally 9.ERP Software --> Getway of Tally --> Press Alt+F3 --> Company Information --> Select the Open Company Name --> Ok

To Modify Company
Open Tally 9.ERP Software --> Getway of Tally --> Press Alt+F3 --> Company Information --> Alter --> Company Name

To Delete Company
Open Tally 9.ERP Software --> Getway of Tally --> Press Alt+F3 --> Company Information --> Alter --> Company Name want to Delete --> Ok