Allow me to chime in and join the conversation, SRC.
Let’s disconnect and reconnect your account to get you back on track. Before we proceed, let me share some of the potential causes of the Error message: client_or_agent_not_authorised:
- Every 18 months you are required by HMRC to re-establish your connection with them in QuickBooks. Try disconnecting and reconnecting your account to fix this.
- Use the correct Gateway Gateway user ID and password specifically for MTD provided to your by HMRC–this should be sent to you via email.
- Make sure you turn on MTD for VAT in QuickBooks and connect to HMRC.
- Utilize the correct VAT registration number (VRN) in QuickBooks. If you've been issued a new VRN, you'll need to update this in QuickBooks, here's how to edit VAT settings.
When you’re ready, follow these steps to unlink the MTD. It only takes a few clicks to accomplish them.
- Open your QuickBooks and head to the Gear icon to select Account and settings.
- Go to the Advanced menu and choose Making Tax Digital.
- Click the Learn how to disconnect button and then follow the steps to complete the process.
Once done, link QBO and MTD again using the correct login credentials.
After running the troubleshooting steps, you should be able to submit an MTD for VAT return to HMRC in QuickBooks Online. You can go over these articles to learn more about how to handle MTD errors and other issues (unable to submit a VAT return).
- Take action status when connecting to HMRC for Making Tax Digital (MTD)
- How to fix MTD issues and errors in QuickBooks Online
Reach out to me again if you have other QuickBooks-related concerns or additional questions about submitting your VAT. I’ll be glad to get this taken care of for you. Have a good one, @SRC1
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