ASM’s CDS Training Platform

ASM has added a ‘live-like’ Customs Declaration Service (CDS) test system access to its Sequoia Customs software to train users in new UK Customs processes without impacting day-to-day business.

We will be contacting all of our customers, who have upgraded to the latest version of Sequoia, by email to invite them to subscribe to this Trader Dress Rehearsal (TDR) service and to make sure Sequoia is configured so that they can access the functionality.

Access to TDR will only be made available to users running the latest version of Sequoia. You can check which is the latest version by visiting the Sequoia Resource Centre


CDS will replace the existing Customs Handling of Import and Export Freight (CHIEF) system, introducing significant changes to processes, which will require training.

The ability to make import declarations to CHIEF will end on 30 September 2022, with the ability to make export declarations ending on 31 March 2023.

HM Revenue & Customs (HMRC) imposed earlier deadlines for imports from the rest of the world into Northern Ireland (NI), with air and ocean imports having to migrate at the end of October 2021.

“ASM has included access to the Trader Dress Rehearsal (TDR) environment of CDS within Sequoia giving users the ability to learn about the new CDS declarations, which are very different from CHIEF, without disrupting daily business as the migration takes place,” said Simon Adams, Program Manager, ASM.

“TDR is essentially a copy of the CDS live environment, which includes real authorisations, Economic Operators Registration and Identification (EORI) numbers, and more, to allow testing of real-world scenarios and declarations which can then be copied to live ones or saved as templates for later use.

“All Sequoia users will have access to this test environment, without them having to install a separate test copy of Sequoia on a different server and without impacting business operations.”

 ASM launched a version of Sequoia with access to the TDR environment for NI customers first to support them to achieve the 2021 deadlines.

“Whilst we still believe that the deadlines to move to CDS are challenging for all parties involved, the Sequoia TDR solution has already proved invaluable for our NI customers, providing a supportive environment in which to train and navigate the migration” said Peter MacSwiney, Chairman, ASM.

ASM’s Resource Centre is now fully updated to support users requiring advice regarding the upcoming CDS changes:



• support: (t) 01784 240400 (e)
• sales: (t) 01784 242200 (e)