The TurboTax online editions are only for tax year 2018 - https://turbotax.intuit.com/personal-taxes/online/
Or you can purchase a CD or Download of the 2018 desktop editions using this website - https://turbotax.intuit.com/personal-taxes/cd-download/
For a 2017 tax return you would need to purchase, download and install on a personal computer one of the 2017 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
A 2017 tax return can only be printed and mailed, it cannot be e-filed.