SA100 TR 7 Box 18: How do I add my Tax Adviser's Reference Number?

SA100 TR 7 Box 18: How do I add my Tax Adviser's Reference Number?

• In the main EDIT page, click SAVE and then CONTINUE:
  

1. Next click YES:
   

1. On the ALMOST THERE page, scroll down until you see the question below and tick YES:
   
2. 
   

1. Next enter your Adviser's details and then the reference number: