Under expenses, why i cannot add in "new expenses category " ?

We can examine a few factors to identify the cause of the error when adding a new category, Teams.

First, please confirm where you see the What is it for message. This will help us identify the solution.

Another potential cause might be that your account or the category you added to your chart of accounts exceeds the maximum limit of 250 accounts.

If the expense category you added does not exceed this limit, try clearing your browser’s cache to remove any stored webpage data that might be causing the issue. Should clearing the cache fail to resolve the problem, try using a different supported browser.

For additional information, you can also refer to this article to learn about usage limits in QuickBooks Online.

Let us know if you have any further questions or concerns regarding adding a new category in QBO.