Could not connect to the update site (Error 42015: The proxy name could not be resolved: 'http') occurs when attempting to update TurboTax.
This error occurs if the specified proxy server is invalid or TurboTax is unable to connect using the proxy server.
- Open the Control Panel app and select Network and Internet.
- Select Internet Options.
- Select the Connections tab and then the LAN settings button.
- Clear the Use a proxy server for your LAN checkbox and select OK twice.
- Update TurboTax again.
If you still can't update or connect to the internet, repeat the preceding steps, except this time select the box in step 4. Then download a manual update.