To install TurboTax on your devices, begin by visiting www.installturbotax.com. Sign in using your Intuit account or create one if you're new. Enter your license code found on your CD or purchase receipt. Next, download the appropriate installer for your operating system—Windows or Mac. Open the downloaded file and follow the on-screen instructions to complete the installation. For mobile devices, download the TurboTax app from the App Store or Google Play. Ensure your device meets the minimum system requirements. Once installed, launch the software, sign in, and start your tax return process with ease and security across your preferred device.