You do not mail tax returns to TurboTax. You mail the federal tax return to the IRS and you mail the state tax return to the state. The Filing Instructions page when you print your tax returns gives you the address for where to mail each tax return.
See this TurboTax support FAQ for printing a tax return for mailing when using the online editions - https://ttlc.intuit.com/questions/1944348-how-do-i-print-and-mail-my-return-in-turbotax-online
