I don't know if everyone needs the CAPTCHA. Some users have reported that that a missing CAPTCHA was "their" issue with the Transmit button not working. They solved it by the methods you have been recommended, but for some reason it's not working for you.
Unless someone else makes an additional suggestion in this thread tonight, it looks like you'll need to speak to the folks at TurboTax Support on Sunday. I left the contact link above.
