Answer and Explanation
Could not connect to the update site (Error 42015: The proxy name could not be resolved: 'HTTP') occurs when attempting to update Turbo Tax. This error occurs if the specified proxy server is invalid or Turbo Tax is unable to connect using the proxy server.
This is an error which mostly occurs when one is installing an incomplete Turbo tax software or also when a download corrupts. It is also caused by virus or malware infections that corrupts the windows system files
To fix error 42015 it is recommended that you you use some of these troubleshooting steps scan your personal computer for errors and fix them