In the past, I think the desktop TurboTax software license agreement allowed one to share their copy of TurboTax with others. However, the current version of the license agreement includes the following:
2.2 You acknowledge and agree that the Software is licensed, not sold. You agree not to use, nor permit any third party to use, the Software in a manner that violates any applicable law, regulation or this Agreement. You agree you will not:
- Provide access to or give the Software or any part of the Software to any third party;
- Reproduce, duplicate, modify, copy, deconstruct, reverse-engineer, sell, trade or resell the Software;
- Transfer your license to the Software to any other party;
- Attempt unauthorized access to any other Intuit systems that are not part of the Software;
- Permit any third party to benefit from the use or functionality of the Software via a rental, lease, timesharing, service bureau, hosting service, or other arrangement; or
- Make the Software available on any file-sharing or application hosting service.
This would appear to allow you to install and use the software yourself on as many PCs as you like, but seems to prohibit the use of your copy of TurboTax by someone other than yourself. If that's the case, you could prepare the tax returns for your family members but could not allow them to prepare their own tax returns using your copy.
https://turbotax.intuit.com/corp/license/desktop.jsp
