TurboTax doesn't usually announce the purchase availability until just right before. In past years for the desktop software it typically has been mid to late November. However, TurboTax did say recently that for Advantage members it should be available in "early November" but doesn't define what that means. And they can move the date back if they decide it's not ready for release.
The initial release is essentially a "Beta version" with many forms not yet completed and approved by the IRS. This year with all the new tax law changes, it may take longer and several updates to get all the finalized forms and the program to have all of its functionalities.
