Most of the tax reform changes affect your 2018 return that you will prepare in 2019. But if you need to update your software, go up to the top corner and click on "TurboTax" and then click on "check for updates" for your 2017 software.
https://turbotax.intuit.com/tax-tips/irs-tax-return/2017-tax-reform-legislation-what-you-should-know...