To access the completed checklists for each service or the audit log you go to the client by clicking their name under the client view, then click on the client summary, scroll down to see the services and checklists for each service, click on the small blue arrow to next to Active Services to expand the section and the checklists, notes and audit log are there under each service

Locate desired client and then Summary

Expand the required Service with the blue chevron

Once expanded, you can see the Checklist as required - you can also see whether it is completed or in progress. 

You'll also note that this is where you find you AUDIT TRAIL

Step-by-step PDF guide attached