For this issue your best bet is contact TurboTax support so they can resolve the problem of you not being able to download your 2018 tax data file along with figuring out why the program is requiring you to start a 2019 tax return.
TurboTax support is open from 5am to 5pm Pacific time, Monday thru Friday
Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Or -
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
Or -
Use this phone number and select TurboTax - 1-800-4-INTUIT (1-800-446-8848)
