Double Sales in QBO

Hi, @philipandrews.I'll help you get rid of your duplicate sales transactions from your books.

In QuickBooks Online, you'll need to review transactions if you duplicate or incorrect entries upon reconciliation. This way, you can fix the issues before you can reconcile accounts smoothly. We can remove all the duplicated transactions directly from the account register. Let me show you how.

If you want to do it manually, you refer to this steps.
 

1. Open the transaction.
2. Go to the More tab, then select Delete.
3. Then click Yes to confirm the action.
4. Repeat the steps for other transactions.
    

However, if you want to delete by batch, here's how:
 

1. Go to the Sales menu and choose the Invoice tab.
2. Locate all the duplicate transactions and check the box icon.
3. After that, click the Batch actions drop-down.
4. Select Delete.
5. Then hit Yes when prompted for confirmation.
    

I've also added this article for more details: Void or delete transactions in QuickBooks Online.
 
Furthermore, I'd also suggest you refer to your accountant. This way, you'll be guided on the process and you're account will still be accurate after deleting some duplicates.

I've also included this reference with a compilation of articles you can use while working with your bank reconciliation: Learn the reconcile workflow in QuickBooks.

After doing so, it will remove all the doubled sales transactions. If you have clarifications managing your sales transactions. I'll be here. Take care!