After you file

If you used TurboTax to prepare your 2017 federal return you can go back into the account and download the desktop software to prepare the 2017 state return.  You have to download to a full PC or Mac--not a mobile device.  And you have to pay for the software.  The return will have to be sent in by mail--it cannot be e-filed.

Or you could get the paper forms from the state and prepare them by hand to mail in.  You will need a copy of your federal return for 2017 in front of you because you need information from it to prepare the state return.

https://ttlc.intuit.com/questions/1900990-how-do-i-file-a-prior-year-tax-return

https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue

Do you know how to access your 2017 return?

Many people have multiple TT accounts and forget how to access them.  Log out of the account you are in now.

Account recovery

https://myturbotax.intuit.com/account-recovery/

https://ttlc.intuit.com/questions/1901535-forgot-your-turbotax-online-user-id-or-password

Or did you use the desktop version of TurboTax?  If so, the files are on your own hard drive or any backup device you used like a flash drive.

https://ttlc.intuit.com/questions/1901486-how-many-turbotax-accounts-do-i-have

https://ttlc.intuit.com/questions/1901535

https://ttlc.intuit.com/questions/1901659-find-your-tax-data-file-in-mac

https://ttlc.intuit.com/questions/1900721-find-your-tax-data-file-tax-file-in-windows

To get a copy of your previously filed returns prepared with online TurboTax https://ttlc.intuit.com/questions/1900748-how-do-i-get-a-copy-of-a-return-i-filed-in-turbotax-online

https://ttlc.intuit.com/questions/1900748-how-do-i-get-a-copy-of-a-return-i-filed-this-year-in-turbo...