Why has my vat return status come back as blocked

Thanks for bringing this situation to the Community, andydwfc,

Let me get the help you need concerning your VAT return.

To further isolate the issue, kindly check the following requirements as this could be the possible reasons why you're encountering this kind of issue:

• The VAT Registration number is the same in QuickBooks Online (QBO) and HMRC. You can confirm this by logging in to HMRC gateway.
• Ensure the same login credentials are being used for the connection setup through QBO.
• Ensure the VAT return dates are the same in QBO and HMRC.
• Confirm the user trying to submit, is the same user who enabled MTD.
• Check for any rejected/failed submissions.
• If you have submitted a return in the past 24 hours, this might not have updated on HMRC’s side, you may need to wait within 72 hours.

However, if the following requirements were verified, this time, I'd recommend contacting our Customer Care support. They have the necessary tools to pull up your account in a secure environment and determined why the status has been changed.

To contact us, here’s how:

1. Click this link https://help.quickbooks.intuit.com/en_GB/contact.
2. Choose the QuickBooks Product.
3. On the Contact Us page, select a topic.
4. Click on Get Phone Number button to see the support number.

I'd appreciate if you can update me on how it goes concerning your VAT return. I'm always here to further assist.