Get your taxes done using TurboTax

After all the discussion, it seems that if you are up to date with the updates you should be able to delete the installation files, although you may want to wait to be sure you don't need to undo one.  You also should turn off updating after filing your taxes.

 

In my case I had almost a GB of old files with some of the time-stamps going back many years.  Now I have cleaned up all but the latest of them.