keep getting error message: You and were working on this at the same time. finished before you did, so your work was not saved

Welcome to the Community, support96.

I want to make sure you're able to work in your QuickBooks Online account without any errors.

This particular error you've received can happen if you have more than one browser tab open with the same QBO account. To get this fixed, I recommend clearing the browser cache before you re-login to your account. The cache is for collecting frequently used data and can cause certain viewing and performance errors if it becomes too full. Clearing it will resolve this type of unusual behavior. Here's how to get this done in Chrome for example:

1. At the top right, click More (three vertical dots), then choose Delete browsing data.
2. Choose a time range, like Last hour or All time.
3. Select the types of information you want to remove.
4. Click Delete data.

The following article provides similar steps for other browsers: Clear cache and cookies to fix issues when using QuickBooks Online.

Please feel free to reach back out if you have any other questions. The Community is always here to lend a hand.