Go to the Gateway of Tally > Alt + F3 > Company Info > Alter. Select the Company which you need to alter from the list of Companies and press Enter to view the company Alteration screen. Alter the company details as required and accept the screen.

Go to the Gateway of Tally> Alt+ F3 > Company Info > Shut Company. Select the company which you need to shutdown from the list of Companies. You can also use Alt+ F1 to shut a Company from the Gateway of Tally Screen. 

To quit working on Tally ERP. 9
(i) Press Esc until you see the message Quit
Yes or No. Press Enter or Y or Click Yes to quit Tally ERP 9.
Alternatively, to .exit without confirmation Press Ctrl + Q from the Gateway of Tally ou can also Enter while the option Quit is selected from Gateway of Tally.

The following are the basic voucher types considered
(i) Receipts: To record receipts of money by cash, cheque, bank transfer
(ii) Journal: To record all non-cash transaction
(iii) Contra: To record transfer of funds between Cash and Bank Account
(iv) Payments: To record payment of money by cash, cheque.
Voucher entry screen is divided into three parts.
(i) Main Voucher Entry
(ii) Button Bar
(iii) Calculator

(i)  Speed
(ii)  Reliability
(iii)  Scability
(iv)  Efficiency
(v)  M/S Report
(vi)  Real-time user interface
(vii)  Motivation and Retrieval Employees interest

1. Simplicity: They are easy to setup and simple to use
2. Speed :  They are capable of generations instant and accurate report.
3. Power: They are capable of maintaining accounts of multiple companies and with unlimited levels of classification.
4. Flexibility: They provide flexibility to generate instant reports for giving period.