I have to delete my all data from QB in One click

I know a way to do delete all your data, Dinostan.

We can purge your data if you're using either QuickBooks Online Essentials and Plus versions. This is only applicable if your account is less than 90 days.

Here's how:

1. Log in to your QuickBooks Online account.
2. Change the URL to /purgecompany.
3. Example: URL shows https://qbo.intuit.com/c28/app/homepage, change to: https://qbo.intuit.com/c28/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 OK once your selections are complete.
7. Once the deletion is complete, you will be rerouted to your home page.

For more details, please see this article: Delete your Data and Start Over in QuickBooks Online.

If your data is  90 days old or older, we'll have to cancel your account and start a new one.

Cancel your account:

1. Go to the Gear icon and select Account and Settings under Your Company.
2. Select the Billing and subscription tab.
3. In the QuickBooks section, select Cancel.
4. Follow the steps to cancel your account. If you use payroll, you should cancel your payroll account too.

Start a new account:

1. Go to https://quickbooks.intuit.com/in/.
2. Fill up the User ID and password.
3. You can use the same user ID and a password you previously had. 

You can also move your existing lists from another QuickBooks Online company. This saves you from having to set up the items from your lists one by one.

In case you'll need further assistance in deleting your data, don't hesitate to get back to this thread. We're always here to help you.