Forbidden: MTD authorisation not found


You may see the following or similar message when you try to authorise your firm for MTD for VAT.

Error message

<?xml version="1.0" encoding="ISO-8859-1"?>
<HMRCError xmlns="" xmlns:i="">
  <Errors i:nil="true"/>
  <Message>Data is out of date; probably updated or deleted by another user. Refresh the page and try again.</Message> 


The error is not caused by Onvio. It is most likely to be caused by a problem at HMRC. 


You will need to contact HMRC VAT Online Services Help Desk to solve the problem.

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