You may want to log out, clear your cookies and cache, and then log back in.
Here's how:
Each browser has a slightly different method for deleting cookies. Choose the browser you're using:
A full or corrupted cache can cause problems in TurboTax, so sometimes you need to clear your cache (that is, remove these temporary files).
Here are the official instructions for the most popular browsers:
Apple's official support site doesn't appear to contain instructions for clearing the cache in Safari. Your best bet is to search the Internet for clear Safari cache or similar search terms.