To download and install TurboTax on your computer, start by visiting the official website  for the latest version. Select the version that suits your needs, whether it's the basic or premium edition. Once the download is complete, open the file and follow the on-screen instructions to install the software. For users in Canada, you can also download TurboTax through turbotax.ca/download. Ensure your system meets the minimum requirements for installation. After installation, launch the program and activate it using the license code provided to begin filing your taxes with ease.