If you don't have a copy of the state ready to mail in already ...
You can finish using desktop software. If you already paid your Online TurboTax fees you can get a download from customer support for free.
To call TurboTax customer support
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
They are available from 5 a.m. to 5 p.m. Pacific time Monday-Friday
https://ttlc.intuit.com/questions/1900990-how-do-i-file-a-prior-year-tax-return
Note: The desktop software you need to prepare the prior year return must be installed/downloaded to a full PC or Mac. It cannot be used on a mobile device.
If you are getting a refund, there is not a penalty for filing past the deadline. If you owe taxes, the interest/penalties will be calculated by the IRS based on how much you owe and when they receive your return and payment. The IRS will bill you for this; it will not be calculated by TurboTax.
So you don't need to start over from scratch ... download the .taxfile from the online system now so you can open it in the downloaded program.
