Did you prepare your 2018 federal return using TurboTax? If so, you can use the 2018 desktop software to finish preparing your 2018 state return. You cannot, however, use TurboTax to prepare a state return now if you did not use TT for the federal 2018 return.
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.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
