To purge your QBO account, the account must be within 60 days old. Follow these steps to reset your company data:

1. Sig in to your QuickBooks Online account.
2. Edit the URL on the address bar. remove everything after app/and enter purgecompany. For example: https://...qbo.intuit.com/app/purgecompany
3. Click Yes to confirm the action.

If you have to open a new QBO account, make sure to click the Buy button to get the discounted price for up to 6 months. If you purchase from the trial account, you have to pay the regular price.

https://quickbooks.grsm.io/US

https://quickbooks.grsm.io/us-promo

@user53171 

"Can i delete all my data and start all over again in quickbooks simple solutions"

NO with Simple Start plan. You will need to cancel your subscription and buy a new subscription again.