To Create the form:
1) Open docs and create a new SS. Don't add anything yet. Save it.
2) Click on Share and check 'to fill out a form'
3) Click on 'Start Editing your form...'
4) Find in the fields and make a selection of the type of Question, e.g. Text.
5) When finished with the question, click Done. You may then click on 'Add a question' and repeat this process until you've created all questions.
6) Click on Save then 'Next, choose recipients'
7) Add the recipients, check the Preferences you want and then Submit.
As forms come back, the document will be updated each time you open it. You can also click on Go to live form' (this can be seen in the future by clicking on sharing for this SS).