I would like delete the email and totally Information and data with quick book account?

Hello, aliasgharsoomro8. 

You're unable to delete your QuickBooks Online account once it's more than 90 days old. You'll need to cancel it.

1. Sign in to your QuickBooks Online account.
2. Go to Settings, then select Account and settings.
3. Select Billing & Subscription.
4. Press Cancel.
5. Follow the on-screen prompts to complete the process.

If this isn't the case, you have the option to purge your company file. Purging is the system deletes all data entered into the company, and you're unable to restore or reverse them.

To purge the data:

1. Log in to your QuickBooks Online account.
2. Change the URL to include /purgecompany.
3. Example: URL shows https://...qbo.intuit.com/app/homepage, change to https://...qbo.intuit.com/app/purgecompany.
4. The next screen will provide a summary of the items to be deleted.
5. Type the word “YES” once the data gets deleted, then click OK.
6. Click Wipe Data once your selections are complete.
7. Once the deletion is complete, you will be rerouted to your home page.

Note: Purge an account is only available for users using QuickBooks Online Plus, Essentials, and Advanced. 

I'm including a link that contains insight on purging: Delete your data and start over in QuickBooks Online.  

Any additional information if you encounter issues or errors, you can always post them here. Have a good one and stay safe!