Navigate to the client file and scroll down the client info tab and you will see a section for Previous Accountant, here you can send out the Clearance email. You just need to

1. Toggle on the Clearance Required
2. Add an Accountants Email Address
3. Accountant Details
4. Send First Clearance Email (if you add today's date the email will generate into the email Queue).
5. Select if you want the email to automatically Request Every.