You can also contact HMRC and ask them to take a closer look. Your error code is CLIENT_OR_AGENT_NOT_AUTHORISED

Hi there, @john447.Have you tried disconnecting and reconnecting using a different browser or an incognito window? If you have done this and still see the error, please contact HMRC.
 

If you haven't tried any steps yet, please do the following:
 

• Disconnect and reconnect using another supported browser.
• Log in to your HMRC account to double-check that your Vat Registration Number is correct.

Let us know if you have further concerns.