Hello, @luckytiger1997.

I'd be pleased to help you today so you'll be able to delete an account in QuickBooks Online (QBO).

You can make the account inactive to delete it under the Chart of Accounts. For the steps:

1. Log in to your QBO account.
2. Go to the Gear icon.
3. Select Chart of Accounts under Your Company.
4. Look for the account you want to delete under the Chart of Accounts page.
5. Click on the drop-down arrow under Action.
6. Select Make inactive.

For more insights about removing accounts in QBO, you can check this article: Remove accounts you no longer use.

You can also read this article for your future reference about organizing accounts under the chart of account in QBO: How to organize your chart of accounts.

Keep posted if you have any other questions about deleting accounts in QBO. I'm always here to help!