To contact TurboTax support for error 606, visit the official TurboTax support website. Log in to your account, click on Contact Us, and follow the prompts to connect with an agent via chat or phone. Error 606 usually relates to installation or update issues, so have details ready for faster assistance. For how to download turbotax software, go to the TurboTax official website, sign in, and navigate to your Downloads section under My Account. Select the version you purchased and click the download link. Follow the installation instructions provided to complete setup on your device and resolve any related issues.