To start a completely new form, select "New" and click next. You also have the option of creating a new form based on a template.
If you already have a draft and would like to edit it, you can select it and click next.
NOTE: You will not be able to edit the form once a respondent has started to create a draft. If you need to make changes to an un-editable form, you can make a copy (template) and make your changes there and replace the old form with the new.
Next Step: Select a Form Type