You have to pay for the TurboTax account before you can either e-file or print the tax return. In the File section of the program on Step 1 pay the TurboTax account fees by credit card. In Step 2 of the File section you are given several options on how to pay the taxes owed. In Step 3 of the File section you are given the option to either e-file the tax return or to print the tax return for mailing.
See this TurboTax support FAQ for the procedure to print a tax return for mailing when using the online editions - https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...
