The copy you save as a PDF is for your records only. If you want an additional copy to mail to the CRA, TurboTax will give you the option to create one only when using NETFILE.
First, you'll need to make sure you complete the Review portion of your return in TurboTax. During this process, you will be asked if you want to Save a copy of your return for your records. Refer to the instructions provided to learn how to save a copy of your return: