I am unable to file my VAT. Is this because HMRC have changed to two-step authentication?
I have always been able to file my VAT via VAT - File VAT - File online and then completing the User ID, password and Agent type. I am now getting the message "Authentication Failure. The supplied user credentials failed validation for the requested service."
Is this because HMRC have moved onto a two-step authentication process or just that HMRC is down?
Many thanks for your help.