Turbotax Business

I completed my return and reviewed.  I ordered the audit defense and turbo tax saved my return before going through that procedure and then I purchased and downloaded the NC  version.  Then I went back to the federal return to efile .  Completed the signature form and then did a preview of the return and all my information that I have worked on so hard is gone.  Turbotax is still there and I closed and tried to load again several times and everything but the income section is gone.  Any ideas?