Need help with Supplementary Declarations? Access the Assisted Completion Service

News article

Get help completing your Supplementary Declarations

The Trader Support Service (TSS) can help businesses complete their Supplementary Declarations (SD) with the Assisted Completion Service.

Using the Assisted Completion Service, a TSS agent will complete up to five SDs a month on behalf of a business for goods movements from Great Britain to Northern Ireland.

What are the benefits of this service?

A dedicated TSS agent will help you by:

  • Organising and validating data required
  • Completing all data entry for the Supplementary Declaration on the TSS Portal
  • Identifying the cause and resolving any errors

The service can be valuable if you:

  • Only make a small number of movements a month; the service can help support with all (or almost all) of your Supplementary Declarations
  • Want help with technically complex Supplementary Declarations (e.g., declarations with many goods items or movements of controlled goods)
  • Are new to TSS and unfamiliar with the declaration requirements or terms

How can I access the service?

You can ask for support from the Assisted Completion Service directly on the TSS Portal by selecting the Assisted Completion button at the top of your Supplementary Declaration.

The service is available to all traders, and can be accessed directly on the TSS Portal or by calling the TSS Contact Centre on 0800 060 8888.

Find further information regarding the Assisted Completion Service:


First published 15 August 2022