In the main EDIT page, click SAVE and then CONTINUE:
Next click YES:
On the ALMOST THERE page, scroll down towards the bottom of the page until you see the box below:
How do I add Additional Information onto my tax return? (SA100 TR 7 Box 19)
In this article you will see step by step instructions on how to add 'additional information' into Box 19 on your SA100 Tax Return
Written by CoCo