Hi there, richard21.
Our developers are already notified and are currently working to fix it. For now, I’d be best to get in touch with our support team to add your details to the list of affected users. It would also help if you share with them your personal experience about the issue.
Here’s how to reach them:
Stay around if you need anything else.
I've had the same problem - I set up it last month and all looked validated, but I'm unable to submit now.
Do we know when there will be a fix?
Upon checking my resources, our developers are still working to fix this issue. If you haven’t contacted our support team yet, it’d be best to reach them now to add your details to the list of affected users (please refer to the steps I’ve provided above).
As of the moment, I’d recommend getting in touch with HMRC for the alternative methods of submitting the figures to the MTD gateway. Then you can mark the period as filed in QBO without submitting online
Stay around if you have further questions about QuickBooks.