To install TurboTax and sign in, begin by downloading the software from the official website or app store. Once downloaded, follow the prompts to install it on your device. After installation, launch the program and select the option to sign in. Enter your TurboTax username and password, or create a new account if you're a first-time user. Follow the on-screen instructions to complete the sign-in process, providing any necessary personal or financial information. Ensure you're connected to the internet for account verification. Once signed in, you can begin using TurboTax to prepare and file your taxes efficiently.

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