Have you tried clearing your cache & cookies yet?
Your browser stores recently visited webpages as temporary files in a cache, which enables the pages to load more quickly when revisited.
However, 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.
Cookies are small files that temporarily store data on your computer. We use them to personalize your experience so you see information you already entered and not items that are irrelevant or repetitive.
On rare occasions, they may make your browser think you already did something that you still need to do. To fix that, you'll need to delete (clear) the cookies from your browser.
Each browser has a slightly different method for deleting cookies. Choose the browser you're using:
Safari for iOS (mobile devices)
For more information, please see TurboTax FAQ: How to clear your cache?
For more information, please see TurboTax FAQ: How do I delete cookies?