If you purchased the 2017 desktop editions from the TurboTax website you should be able to download your software purchase after signing onto your download account - https://shop.turbotax.intuit.com/commerce/account/secure/login.jsp?pagecontext=download
However, if you are an Advantage subscriber then there may be a problem when attempting to download the 2017 software. See this TurboTax support FAQ for the problem - https://ttlc.intuit.com/questions/4136734-why-am-i-unable-to-download-my-turbotax-advantage-2017-sof...
Use this website to contact TurboTax support - 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
Note - Support is open from 5am to 5pm Pacific time, Monday thru Friday
