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Let's first try some browser troubleshooting steps. This way, we can isolate the issue if it's caused by an overloaded data in your browser.
Please access your QuickBooks Online account via a private or incognito browser. Feel free to check below for the keyboard shortcuts based on the browser you're using.
If it works, this means that you need to clear your browser's cache to permanently resolve the issue.
You may also want to read this article to learn more about overpayments: Resolve Tax Overpayments or Underpayments.
If you still get the same result, I recommend contacting our QuickBooks Customer Care team. One of them can closely investigate your tax overpayment and help you further.
Let me know if you have any other concerns. I will always be delighted to help you.