@jchianese48 You most certainly can download and install the 2019 software while the 2017 software is still installed on the same computer. For example I have TurboTax installed for tax years 2007 through 2019 on my personal computer running Windows 10 with no issues.
There is no need for you to get the CD as the CD only has the initial release and would have to be updated. Whereas the download already has all the current updates.
TurboTax support is closed on the weekends.
Support is open from 5am to 9pm Pacific time, Monday thru Friday
Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
