That is very strange, that you can't generate a PDF of your return! Are you using TurboTax Online? If so, have you cleared your Cache and Cookies between attempts?
If using TurboTax Desktop, is TurboTax installed on your C drive? Are you running in Administrator mode? Here's How to Turn Off Anti-Virus Programs which can improve connectivity with Intuit servers.
Otherwise, you can Contact TurboTax Support, where the techs can get into your computer for more help.
Here's How to Get a PDF of Your Return.
@GomezG