Thanks for posting this question in the Community, htlfabrication,
Let me get the help you need concerning Vat Detail report in QuickBooks Online.
To identify which transactions causes the wrong Vat Detail report, kindly pull up the report and drill down the detail of each transaction.
I'd also invite you contacting our Customer Care support. They have the necessary tools to pull up your account in a secured environment and determine what caused the issue.
To contact us, here’s how:
- Click this link https://help.quickbooks.intuit.com/en_GB/contact.
- Choose the QuickBooks Product.
- On the Contact Us page, select a topic.
- Click on Get Phone Number button to see the support number.
If there's anything else you need help with, please let me know. I'm always here to answer it for you.
