To activate TurboTax Desktop after entering your license code, launch the program and enter the code when prompted. Follow the on-screen instructions to complete activation. If you already installed TurboTax, go to the Help menu and select “Activate” to enter your code. Activation ensures full access to the software’s features.If you're wondering how do i download turbotax » , visit the official TurboTax website, sign in to your account, and navigate to your Downloads section. Select the version you purchased and click “Download.” Follow the installation instructions, then activate with your license code to begin preparing your taxes.