Some versions are updated now, and the others should be updated with the next few days. All versions will take this into account before the IRS begins to accept tax returns for the 2020 tax year.
If you are using the desktop product, be sure to check for updates each time you start your program. If you are using the online version you should see the update automatically. Sometimes, it can help to clear browser cache and cookies and refresh to ensure you are seeing the most current version.