You can purchase and download desktop 2017 software.<a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/personal-taxes/cd-download/">https://turbotax.intuit.com/personal-taxes/cd-download/</a>
Or you could use the tax caster tool for free
<a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/tax-tools/calculators/taxcaster/">https://turbotax.intuit.com/tax-tools/calculators/taxcaster/</a>
If you start using the 2017 software, bear in mind that there will still be quite a few updates coming out later.
You can apparently buy the 2017 desktop version now, download and install on your computer.
Turbotax online won't open for a while, and the online program is frankly inferior anyway, in my opinion.
The online 2016 program is closed. And there's not much point buying the 2016 download, since the 2017 download is for sale now.