Banking transactions have been duplicated into another of our accounts I have excluded them from one account but cannot amend the bank balance of the account

Welcome and thanks for posting in the Community, @broom83.

Since you already excluded the duplicates that were posted to the other account, you can manually update the main bank account. This will let you download those transactions and correct the balance.

Here's how to do it:

1. In QuickBooks Online (QBO), go to the Banking menu at the left pane to get to the Banking page.
2. Select the name of the bank, then click the Update or Update Now option at the upper right. 
3. If asked, enter your Multi-Factor Authentication (MFA) credentials.
4. Tick Continue update. QBO will notify you once finished.

To learn more about the process, check out this article: Manually download online bank transactions in QuickBooks Online.

Just in case, I'll add this article that tackles how to reconcile an account for future reference: Reconcile an account in QuickBooks Online.

Please let me know if you have any other questions or concerns in the comment section below. I'm always here to assist. Have a wonderful rest of the day!

The bank balance in the Euro Account was identical to our Sterling Account it was a straight duplicate when I updated banks accounts on Friday 4th September. 

Even after excluding the duplicate transactions from 'For Review' in the Euro Account, which were duplicate Sterling transactions,  the Euro bank balance is still incorrect as it has not updated correctly.   It seems to be an issue between the HSBC bank feeds and QBO

Hello, @broom83.

The bank balance displayed in your account depends on the data that your Financial Institution shares with us. I have looked into this further and at this time there's no reported issue affecting other users.

Here are a few things you can perform to resolve this:

Step 1: Double-check your bank statement

• Log in to your bank’s website and check those statements. If transactions are showing twice, your data came incorrectly. If you only see it once, then connecting your bank account twice is the cause of the issue.

Step 2: Check for duplicate accounts connected

• Does your Euro account share the same login credentials with your Sterling bank? If not, are the duplicate transactions manually imported into QuickBooks? 

Also, I'd recommend contacting our Customer Care Team. This way, we can request for a formal investigation to determine the root cause of this unexpected banking behavior. Here's how to contact them:

1. Sign in to your QuickBooks Online company.
2. Click Help (?) at the top right.
3. Select Contact Us.
4. Please enter a short query and hit Let's talk.
5. Choose to Start a chat or Get a callback.

You can also check our support hours to get our supports at a convenient time.

Additionally, you can always visit the Community Help page to search for articles such as banking and reports or click the Topics tab above.

Please keep me posted if you have any additional issues or concerns. I'm more than happy to answer them. Take care always!