Hello there, @rostomhaidar. Glad to know that you're using QuickBooks trial.

Are you using the trial period for  QuickBooks Online Plus? If yes, restarting the process or clearing the Chart of Accounts can only be done by making the imported accounts inactive.

You can do it one by one. Here's how you can make accounts inactive in QuickBooks Online:

1. Select Accounting in the left navigation menu.
2. Find the account you want to delete.
3. Then, click the drop-down arrow in the Action column.
4. Choose Make inactive.
5. Click Yes. Then, do the same steps for the other accounts.

That helps you not display the accounts you don't need. I've gathered some articles where you can get more ideas about managing accounts in QuickBooks Online:

• Delete an account on your chart of accounts in QuickBooks Online.
• Manage default and special accounts in your chart of accounts.

Comment below if you have more concerns as you go along with your QuickBooks Online trial. I'm always here whenever you need assistance. Stay safe and be well, rostomhaidar.