How can i delete a bank account no longer used

You'll have to make it inactive to delete the bank account, Hotlocks. 

I'll show you the steps:

1. Click Accounting.
2. Go to the Chart of accounts tab.
3. Look for the bank account.
4. Click the View register drop-down arrow, then select Make inactive.
5. Select Yes to confirm.

You can also refer to this article for more information: Delete an account on your chart of accounts in QuickBooks Online.

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