You must have an internet connection to e-file a tax return. Otherwise you must print, sign, date and mail the tax return to include all forms W-2 and 1099 that have taxes withheld.
See this TurboTax support FAQ for printing a tax return for mailing when using the Windows desktop editions - https://ttlc.intuit.com/questions/1943980-how-do-i-print-and-mail-a-return-in-the-turbotax-for-windo...
See this TurboTax support FAQ for printing a tax return for mailing when using the Mac desktop editions - https://ttlc.intuit.com/questions/1944096-how-do-i-paper-file-in-the-turbotax-for-mac-cd-download-so...
