I'm here to lend a hand, lpoyning.
There are times that your default browser is filled with data and temporary files from previously visited websites.
To fix this, kindly access your QuickBooks Online account using an incognito window. Doing so helps isolate the issue. You can use the keyboard shortcuts below:
- Chrome: Ctrl+Shift+N
- Internet Explorer: Ctrl+Shift+P
- Firefox: Ctrl+Shift+
- Safari: Command+Shift+N
Once a private browser is open, try to submit VAT again. If it works, to ensure this doesn't happen again, it's a good idea to clear the cache of the browser you're using or trying other supported browsers.
You can get back to me anytime you have additional questions in QuickBooks by posting your response below. I'll do whatever it takes to ensure your concerns are addressed. Have a great day.