I have lost all my posts to QB from Feb 2019- Oct 2019. they have totally disappeared.

Hi there, 

Reviewing your past information and transaction data in QuickBooks Online is essential. If you're noticing that some of your transactions are missing, you may be experiencing a browser-related issue. I'd be happy to walk you through some troubleshooting steps in order for you to get back on track.

Try clearing the cache and cookies in your browser. These are the stored Internet files that build up over time and they can cause bugs in QBO and other sites. Here's how to clear them: Clear cache and cookies to fix issues when using QuickBooks Online.

You can also try using an Incognito window in Google Chrome. This is a private window that runs independently from the main browser, and it helps diagnose browser-related problems. Here's more information about what that is and how to use it: Browse in Private. I'd also recommend trying an alternative browser if the issue persists. 

If you're still not seeing your posts from Feb-Oct 2019, please don't hesitate to reach out to our tech support team so an agent can investigate this further for you. 

Have a great day.