The new Customs Declaration Service (CDS)

The new Customs Declaration Service (CDS) is being introduced in order to handle declarations under the Union Customs Code. It will replace CHIEF, which has been running for more than 25 years.

This page will keep you up to date with the HMRC development and rollout of the new system as well as our progress towards CDS.


Accessing the CDS Test environment in Sequoia
2 Mar 2022
ASM’s CDS Training Platform
10 Dec 2021
CDS & Sequoia Update
4 Nov 2021
CDS Replacing CHIEF
8 Apr 2021
Letter from ASM to HMRC on CDS and NI
8 Apr 2021

• support: (t) 01784 240400 (e) helpdesk@asm.org.uk
• sales: (t) 01784 242200 (e) sales@asm.org.uk