Issues with HMRC systems and processes
Man in suit holding a magnifying glass over a red exclamation mark warning symbol

 

The ATT welcomes feedback from members who encounter issues with HMRC's systems or processes. Where possible, we aim to report such issues to HMRC to help them improve their systems and services. 

It is not always possible to take action based on individual issues reported to us, but where more than one member reports the same issue, we can build a body of evidence that the problem encountered may be systemic rather than isolated. In addition, HMRC are better able to investigate issues where we can provide case studies using identifiers such as Unique Taxpayer Reference numbers or National Insurance Numbers. 

Information required 

The forms linked below specify the information required. As a minimum, when reporting issues please ensure you include:

  • The tax regime and HMRC system/process in question
  • A description of the issue, and whether it affects one client or several
  • Client identifiers (having obtained consent to share with the ATT and with HMRC)
  • Contact details in case we need further information (which may include screenshots or other evidence of the issue)

 

Known issues

Below is a record of issues reported to the ATT, or which the ATT is otherwise aware of. If you encounter any of these issues where the "Further evidence needed" column shows "Yes" and wish to provide evidence to us, please use our form Provide evidence of known issues with HMRC systems to the ATT, ensuring you include the relevant issue number from the table below. 

Issue number Regime HMRC system/process Description Status Further evidence needed?
2506 National Insurance 2024/25 tax returns Letters issued regarding one of three incorrect adjustments to the Class 2 NIC reported on 2024/25 tax returns Reported to HMRC. Resolution actioned - see Agent Update 133.  No
2509 Income Tax Making Tax Digital No client list visible in the Agent Services Account (ASA) Known issue - work with HMRC ongoing. See guidance in our MTD digital readiness tips for agents on how to search for clients in the ASA. No

 

New issues

If you encounter an issue which is not shown above, please report it to us using our form Report a new issue with HMRC systems to the ATT.

 

 

Any submissions to the ATT will be handled in accordance with our policy on providing replies to technical queries.

If you would prefer to contact us about a new or known issue by email, please send details as requested above to: [email protected]