2019 software has not yet been released. It will be available in late November/early December. It is too soon to prepare a 2019 return, since the tax year is not over. You will not be able to file a 2019 return until late January 2020. And beware of filing early--there will be updates needed to the software; and early filers are often the ones who end up in the identity verification never-never land and wait for months for refunds.
Online Turbotax software products for tax year 2019 are not yet available. Check back in about one month (December 1).
If you are interested in a download for install on your personal computer, you can pre-order here.