Error message: 1046 Authentication Failure. The supplied user credentials failed validation for the requested service

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• https://help.gosimpletax.com/hc/en-gb/articles/115000024370-Error-message-1046-Authentication-Failure-The-supplied-user-credentials-failed-validation-for-the-requested-service

  The error message you have received is sent back from HMRC when the HMRC ID and password provided do not match their records. In order that you can submit your tax return when you are presented with question asking if you have a HMRC ID and password ...

• Can't submit my return. Authentication error message.

  The HMRC credential validation is indeed one of the most complex and time consuming aspects of filing a tax return. So please bare with me testing the 3 possible reasons for HMRC's declining your submission.                You accidentally copied ...

• SA102 : ERROR MESSAGE: Teacher On Repayment Of Teachers Loan Scheme'

  The error message relates to a question no longer active on the Employment (SA102) page. To correct this please select the Employment (SA102) page and then click the EDIT button. Please then update the question DO NOT CHANGE to NO then save the form. ...

• https://help.gosimpletax.com/hc/en-gb/articles/202028828-Can-t-submit-my-return-Authentication-error-message-

  The HMRC credential validation is indeed one of the most complex and time consuming aspects of filing a tax return. So please bare with me testing the 4 possible reasons for HMRC's declining your submission.                you accidentally copied ...

• How-Do-I-Get-An-HMRC-User-ID-Password-and-UTR

  Registering for an HMRC User ID, Password and UTR. Register for self-assessment with the HMRC here. Complete the form.  Sign a printed copy (sent to your email address) then post it to the HMRC.  The address is on the form. Your UTR and activation ...