Sorry you will never be able to activate the 2019 program with the License Code. The License Code started in 2019. So 2019 needs to connect to Turbo Tax to verify the License Code. But they have stopped supporting 2019. They only support and update the last 3 years and put 2022 in the last years product pages and took off 2019.
Even if you install 2018 or prior you won't be able to update or download any state program you will need.
Funny, my 2019 code worked at InstallTurboTax.com, where Intuit says "Enter your license code to confirm your purchase and retrieve your download." Intuit accepted the code from the CD box then and gave me the 2019 software to download. However, when the software asked for the *exact same code*, the code is now rejected and the software is useless.
Clearly they have the codes still saved in their computer system somewhere but they refuse to either (a) authorize re-installed software or (b) eliminate the need for an authorization code. They could choose either. Instead they make their software useless. They intentionally "brick" it.