No you cannot file 2017 and 2018 together. Each tax year is separate. You can go back and finish it in the software--it will cost you money to do that--or you can go on your state's tax website and get a 2017 form and prepare it yourself and mail it.
To finish a prior year return started in TT online:https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb
https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue
**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.**
