If you decided to print and mail the tax return then you should have followed the instructions in this TurboTax support FAQ for printing 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...
Only you can print, sign, date and mail the federal tax return to the IRS. What to include with the tax return and where to mail the tax return is shown on the Filing Instructions page when you print the tax return.
