TSS is on hand to support you with the completion of your supplementary declarations. You can access support by:

  • talking to a TSS customs expert who will be able to guide you on the information you are required to provide for your supplementary declaration and where to obtain this
  • reading guidance on completing supplementary declarations, available here. These guides explain tariff options, what simplifications are on offer and the data you need to provide to complete your declarations when taking advantage of these simplifications
  • using the new gov.uk tool to check if you need to pay a tariff on goods brought into NI from GB, available here

For a full explanation of the terminology used in our guides, you can access the Jargon Buster for simple and accessible explanations.