I feel your frustration! I spent several days wrestling with this issue. I phoned TurboTax Customer service and was finally elevated to the higher tech support level (after 2 hours on the phone with 2 other support reps). It is the oddest thing, and having been in the computer business for over 40 years, that is saying something. So, here is how we finally got around it:
When you have the white Activation screen open, leave it open.
Type your Activation Code in to NotePad, including dashes. Then highlight it and copy it.
Then on your screen, right click and go to Display Settings.
Change Display Settings to 800x600, Say OK.
This will make your screen type very large.
The Activation Screen may now show you where to Paste the Activation Number with Control V. If it doesn't, just move the cursor until it looks like you can type and paste it in. DO NOT CLICK ON THE ACTIVATE BUTTON for some reason.
Once again right click on the desktop and select Display Settings.
Change the settings back to normal, and save them.
When the screen changes, you should see that the Activation was initialized and you can now use TurboTax.
I know, a very strange and complicated work around.
