This Supplementary Declaration Assistant tool will help you identify completion requirements for your Supplementary Declarations on the TSS Portal, including help with grouping your goods under one commodity code. This tool can be used for goods movements from Great Britain to Northern Ireland created on the TSS Portal prior to 1 January 2022. Please ensure you carefully read the criteria in the tool to ensure you can use the tool for your goods movement.

For support with using commodity code grouping simplification on Supplementary Declarations for movements made after 1 January 2022, please review the NICTA commodity code grouping guide.