I want to roll back the opening balances of payroll whch i had entered while setting up, I want to start from scratch.

Hi ashish-canada,

Welcome to the Community. Having the correct opening balances of payroll is essential to keeping your books balanced. QuickBooks Online payroll is a great program that offers the ability to simply pay your employees and track your remittances. I'd be glad to point you in the right direction to roll back the opening balances of payroll.

In order to change or remove the opening balances of payroll, I'd encourage you to reach out to our customer support team. They'll be able to verify your account and complete the change in the back end. Here are some options available to contact our team.
 

• Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat. 
• Social Media: Facebook, Twitter, in a private message.

Let me know if you have any questions, I'll be happy to help.