You can do 2019 online here, https://turbotax.intuit.com/personal-taxes/online/
Or buy the 2019 Desktop program here, https://turbotax.intuit.com/personal-taxes/cd-download/
You can only buy the prior year desktop programs. You have to buy a different program for each year. You can buy 2017 & 2018 here,
https://turbotax.intuit.com/personal-taxes/past-years-products/
If you buy the Desktop program you can buy any version. All the Desktop program have the same forms so you can buy a lower version like Deluxe.
