When you first log in, you will see a page with colorful buttons. These are your forms and folders. Folders are used to group similar related forms.
The blue button with 5 lines takes you to a list of completed forms.
When viewing completed forms, you can use the filter to narrow the list of forms.
To complete a form, click on the button of which form you'd like to complete.
Fill out the fields in the form and click on the Submit button at the bottom of the page. If you would like to save it to complete at a later time, you can save it as a draft.
Once the form has been submitted, it will appear in the completed forms list.