You can't upgrade yet. Not until the 2020 online versions open in December. Do you want to sign up to buy the Desktop Home & Business program?
The Desktop CD/Download program usually comes out in early November. The Online Personal versions open in December. Keep checking back. After Oct 15 the current year programs move to the past year product page and the next year programs will say Pre-Order until available.
Buy the personal Desktop CD/Download programs here
https://turbotax.intuit.com/personal-taxes/cd-download/
Buy Turbo Tax Business here
https://turbotax.intuit.com/small-business-taxes
In December you can start a Online return here
https://turbotax.intuit.com/personal-taxes/online/
