If your state income tax return shows a tax refund there is no penalty for filing a tax return after the due date.

See this TurboTax support FAQ for completing a prior year return started with the online editions - https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb...

If you have already paid for the online 2016 account then contact TurboTax support during business hours

See this TurboTax support FAQ on how to contact Support - https://ttlc.intuit.com/questions/3401489