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 by calling the TSS helpline on 0800 060 8888 (from 7:30am to 10:30pm seven days a week) or by raising a case on the TSS portal. Through this process you can get access to experts 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 your tariff options, what simplifications are on offer and the data you need to provide to complete your declarations when taking advantage of these simplifications.

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