When the Supplementary annual GST return 2026 is complete, the declaration must be made by someone who is authorised by the entity to do so. This declares the information in the supplementary return is true and correct.
To make the declaration, check the Declaration box at 'I declare I am authorised by the entity to complete and lodge this return; and the information is true and correct'.
Include the following details of the person making the declaration:
- full name and position
- daytime phone number
- a signature (either written or a digital copy of a written signature)
- tax agent number (if applicable)
- declaration date – on the PDF version, select the date in the drop-down box next to Date.
Continue to Section H: How to lodge.
Return to Supplementary annual GST return 2026 instructions.