Installturbotax.com is the official website to download, install, or activate TurboTax software on your computer. To get started, visit installturbotax.com, then enter your license code or installation key that came with your CD or purchase. Sign in with your Intuit account, select your TurboTax version, and follow the on-screen steps to download and install it. Once installed, open TurboTax, sign in, and start preparing your taxes easily and securely.