PTO automatically creates a PDF file for each return.  All you need to do is to save the PDF file and you can print it with any PDF reader.  If you print the file to a PDF file, it will not be optimized and you may end up with a much larger file than necessary.

See this article for more info on how to: https://proconnect.intuit.com/community/help-articles/help/how-do-i-print-a-return-in-proconnect-tax...