| Article ID: 3257 Last updated: 09 Aug, 2022 If you have already filled under Making Tax Digital and you are receiving a 403 error (Client or Agent not authorised), there are multiple reasons this error can be returned but HMRC's investigations have shown that in over 90% of cases the reason is one of the following: 
 If you are an Accountancy Practice using our software you may find What to do when receiving error 403 (Client or Agent not Authorised) - Practice User more appropriate. Please can you do the following by going to: 
 
 
 
 
	        
        
        
            
        
            
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