Hi there, @AlMilstein. Thank you for providing the details and the error message you encountered while trying to submit a VAT return.
The We can't connect to HMRC right now error occurs when QuickBooks is no longer actively connected to HMRC.
Authorization needs to be renewed every 18 months to protect your personal and financial data.
This is why you are now encountering this error, even if you have successfully submitted VAT returns for the last Dec. 31, 2025.
To fix the issue, follow these steps to re-establish the connection:
- Go to the Taxes section in your QBO account.
- On the VAT page, click the Edit VAT dropdown and choose Edit Settings.
- Under Digital VAT submission, toggle MTD off.
- Reconnect QuickBooks to HMRC using your valid MTD credentials.
The CLIENT_OR_AGENT_NOT_AUTHORISED error occurs when QuickBooks Online (QBO) is not authorized to connect to HMRC, or the provided credentials are incorrect.
Since you have reconnected your MTD, ensure you are using login details specific to MTD rather than your general Government Gateway credentials.
If the issue persists, I recommend contacting our Live Support team. They have the expertise and resources to determine its root cause and provide an effective solution.
To get help, follow these steps:
1. Click on the Help menu or the (?) icon located in the upper-right corner of QBO.
2. Navigate to the Assistant tab.
3. In the chat box, type contact support and press Enter.
4. Provide a brief description of your concern, then click Continue.
5. Select your preferred option: either Have us call you or Chat.
As you begin the process mentioned above, please ensure to check their support hours.
My team and I are just a message away for all your QuickBooks Online needs.
