Hello there, @Chris_Birchall. I appreciate you coming back to provide more details about the duplicate entries.

To remove the duplicate from the bank account history page, you can simply go to the chart of accounts.

Here's how:

1. Go to the Gear icon at the top.
2. Select Chart of accounts.
3. Locate and open the account.
4. Click the "View register" link under the Action column.
5. Find and open the duplicate entry.
6. Once the transaction is open, delete it from there.

But before deleting the duplicate, it'd be best to wait for the reply from Zettle Support. They may correct the duplicate entries from the past and now.

For more details on where to find your transactions in QuickBooks, see this article: Find, review, and edit transactions in the account history in QuickBooks Online.

For future tasks, here's a great resource about the best practices when reconciling: Reconcile an account in QuickBooks Online.

If you need additional help with your duplicate transactions, please let us know. We’ll be right here to further assist. Take care, and I wish you continued success.