Hi there, @mikey007.

If you don't have any recurring transactions on the Recurring Transactions page you should be able to delete or inactivate your accounts under the Chart of Accounts. Since you're still receiving an error message about not being able to delete the account since it's used by a recurring template or scheduled liability payment, ensure to select All for the Template Type, Transaction Type, and Department to verify the list of your recurring transactions.

If you're able to view your recurring transactions after the necessary customization, you have to find the template to be able to delete the account.

If you don't have any recurring transactions from there, I recommend getting in touch with our Support Team to check and investigate this further. For the support's contact information, you can check it here: Contact the QuickBooks Online Customer Support team.

To learn more about recurring templates, you can read this article: Create templates for recurring transactions.

You can also check this article for additional reference about making accounts inactive in QBO: Remove accounts you no longer use.

In case you have any other QuickBooks concerns in the future, you can also read this article: Help articles for QuickBooks Online.

Keep posted if you have any other questions. I'll be right here to help!