This may have been a temporary issue. Please do try again, and if it happens again and you are using TurboTax Online, the most likely reason for buttons that don't work or not being able to enter information is that something in the web browser is not displaying the page properly. The easiest way around this is to simply use a different web browser. You can select from Google Chrome, Mozilla Firefox, Internet Explorer, Safari, and more. If you need to install another browser, be sure to go to the trusted home site for the software for security reasons. Or you can clear the cache and cookies in your current browser.
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If you are using the Turbo Mobile App, try opening Turbo Tax in the browser window on your phone. It will use the same login information but may display the page better.