How can i delete a duplicated vat quarter expense?

Thank you for reaching out, @dtucky. 
 

To provide an accurate resolution about deleting a duplicate VAT expense, I'd like to ask what specific error did you encounter when attempting to delete it? A screenshot would help me determine what's causing the error. 
 

In the meantime, let's troubleshoot your web browser. This unexpected behavior may be due to browser-related issues. Here's how:

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Additionally, you'll want to reconcile your account every month to ensure your accounts are always balanced and accurate. Check out this article for complete guidance: Reconcile an account in QuickBooks Online.

We'll be keeping an eye on your response regarding the specific error encountered when trying to delete a duplicate VAT expense. For other QBO concerns, please include them in the comments. We're here to help. Have a good one. 

sorry i cant seem to do a screenshot.

It saysAny transactions in a VAT period marked as filed can’t be changed on the Flat Rate Scheme. If you need to update or correct something, just create a new transaction.

Thanks for getting back to us here, dtucky

Because of the way Making Tax Digital works on the Flat Rate Scheme, you can't edit or delete transactions in a return that has already been filed.

If you need to make changes, you'll need to create a journal entry to reverse the original transaction by reversing the amounts of the debits and credits.

You can view the journal of the duplicate transaction by opening the expense > click more on the bottom toolbar > transaction journal. 

To view a full demo, please see the drop-down heading How to make changes to a transaction that has already been filed in a VAT period. 

Thanks again for reaching out to the Intuit QuickBooks Community for support. We'll be here if you have any further queries. 

Thanks for your help. I have done the journal and my vat in the balance sheet is now showing correctly. The amount is still showing though when i click on expenses. How can I clear this?

Hello there, dtucky, Let me route you to our support team for specialized assistance in clearing the residual amount and ensuring expenses and VAT are correctly reflected.

Here's how:

1. Select Help (?) at the top.
2. Click the Search tab, and select Contact Us to connect with a live support agent.
3. Choose a way to connect with us:
   • Start a chat with a support expert. Live chat all day, M-F.
   • Call us. M-F, 8:00 AM to 10:00 PM, and S-S, 8:00 AM to 6:00 PM.

In addition, you can check out this article to learn how to manage your reports: Run reports in QuickBooks Online.

If you have any QuickBooks-related concerns, feel free to leave a reply below. We're here to assist you 24/7.