When you open up a form you get a preview of that form. You are not able to type on the preview. To be able to complete the form you need to click on the blue 'Complete new' button. This will open up a drop-down box which you will be able to complete.

NOTE: You will only see the 'Complete new' button if you have permission to complete that form. All forms require completing by specific 'roles'. If you see 'Available to other roles' to the right of the form, this means that you are unable to complete that form. If you hover the cursor over the wording, it will reveal which role(s) can complete the form:

You should also be aware that completion is not possible until the placement is live. Your ePAD will go live on the first day of your placement. Before then you will see the ePAD template but not the live version so you won't have any drop-down boxes and will be unable to complete/write on any of the assessments.