What type of installation is being done--Windows or Mac, CD or Download? Explaining more about your issue can help us determine what resources could best resolve the issue.
To get started, here are some resources:
For more information, see:
How do I install the TurboTax software for Windows?
How do I install the TurboTax software for Mac?
How do I download the software I purchased at TurboTax.com?
Just in case troubleshooting is needed:
Troubleshoot installation and running TurboTax for Windows
Troubleshoot TurboTax for Windows downloading issues
Troubleshoot TurboTax for Mac updating issues
For the state:
Download TurboTax State (Windows)
Download state program for TurboTax for Mac
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