If QBO file is 6months old can it be purged. If yes then what are the processes of purging it

No, you cannot purge it. Why don't you just sign up for a new account?

A total purge isn't possible for a QuickBooks Online (QBO) company file that is 6 months old. The Purge option is only available during the first 60 days after account creation. To start fresh, you'll need to cancel your existing QBO subscription and create a new company file.

Before making any changes to your financial records, it’s important to consult with your accountant. They can help determine whether this process is suitable for your business.

For more information on this process, you can refer to this article: Delete your data and start over.

Feel free to reach out if you have any additional questions or concerns.