What are you trying to edit? You are signed into FormsCentral? I'll need a little more information to assist, describe what you are doing please, a screen shot would also help.
You might want to review this overview tutorial: http://forums.adobe.com/docs/DOC-1413
This set of Help docs should also help: http://helpx.adobe.com/acrobat-com/formscentral/topics.html
Why doesn't the design tab appear in order for me to edit my survey, I'm
doing some research and this is hindering my efforts. Here is a screen
I don't see an image for a screen shot. You can attach your image to the forum thread by using the "Camera" icon to browse for a photo.
If you don't see the "Design" tab it sounds like one of two things:
1) The form was created from the "Import PDF" feature by importing an existing PDF form. This feature does not enable you to edit the PDF or to create an "Online" version of the form, it allows you to use FormsCentral to collect and manage the response data. Here is an tutorial on the Import PDF feature: http://forums.adobe.com/docs/DOC-2654
2) The form was not one that you are the author for, it was shared with you at a permission level that allows you to view the responses but not to edit the form. This describes the sharing feature: