Turn on Verbose Logging for QuickBooks Web Connector

To turn on verbose logging for your QuickBooks desktop. You need to
  1. Go to start menu and type in the word "RUN" and select run command.
  2. Then type "regedit.exe" in run command and press "OK" button.
  3. It will open registry editor. From here navigate to HKEY_CURRENT_USER -> Software -> Intuit. Then click on "QBWebConnector" folder. Here you have to change the "Level" key. Right click on "Level" and select "Modify...".
  4. Now type "VEROBSE" in "Value data:" field then click "OK" button.