If you have money in your account, you need to transfer it to another account. Go to the Canara bank website at http://www.canarabank.in/ to do this.
You will need to contact the bank and inform them that you would like to close the account. Contact the bank by calling 1800 425 0018. You will be notified of the account closure by the customer service representative. Then, write an application for account closure. In your application, you should write the number, owner details, and reasons for closing the account.