After you file

In the File section of the program on Step 3 you are given the choice to either e-file the tax return or print the tax return for mailing.

 

See this TurboTax support FAQ for printing a tax return for mailing - https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...