Article ID: 2025205 Last updated: 17 November 2015
Error: 1046 Type: Fatal Message: Authentication Failure
The supplied user credentials failed validation for the requested service
When making a Full Payment Submission or Employer Payment Summary submission you may encounter an HMRC gateway submission error number 1046, authentication error. As the message suggests, the error is related to the authentication details (username/password/etc.) being provided to the gateway for the submission.
The HMRC gateway cross-checks 4 pieces of information in order to authenticate and allow a submission.
1. Your gateway User ID
2. Your gateway Password
3. Your company's Tax Office Number
4. Your company's Tax Office Reference
Note! HMRC usually provides the Tax Office Number and Reference as one string, separated with a slash, for example 123/A777 or 123/AB345.
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