If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email email@example.com.
Please tell us what format you need. It will help us if you say what assistive technology you use.
The CHIEF HMUT service is primarily a software testing service available to both Trade and HMRC CHIEF users. It is designed to allow users the opportunity to test software or familiarise themselves with functionality for the next CHIEF live release.