Yes. As long as you’re a registered user you can save any progress you’ve made while creating a document by clicking “Save and Finish Later” in the Q&A tool. Doing this will save your progress and you can then come back at a later time to finish it. 

You may resume creating your document by signing into your account and going to your “My Account” page where all your documents (completed and in progress) are saved.

If you’re not yet a registered member, you will need to sign up either as a Free member or a Premium member before you can save your progress and finish the document at a later time.