Start a new 2016 online tax return using this website (not the Free edition) - https://turbotax.intuit.com/personal-taxes/online/
Transfer the 2015 tax data file from your computer to the online 2016 tax return. See this TurboTax support FAQ for the procedure - https://ttlc.intuit.com/questions/3006086-can-i-transfer-my-2015-turbotax-return-from-my-computer-to...
Note - The online editions can only be used to complete one tax return per account and user ID. If you need to complete more than one tax return, use the desktop CD/Download editions. The state tax program is an additional charge using the online editions. There is no direct access to any forms, schedules or worksheets using the online editions.
