How do you delete expense categories that were entered by error?

Hi miyagi1956,

Welcome to the QuickBooks Community. The program is designed to help you keep track of your income and expenses with ease. I'll be glad to share more info so you're on the right path with achieving your QuickBooks goals.

Before we get started, it's important to note that we cannot delete an account. An alternative for this would be making the account/category inactive. Here's how:

1. Navigate to the Accounting menu.
2. In the Chart of Accounts tab, find the account you want to make inactive. You can utilize the search box to easily find the account.
3. Once you find the account, click the drop-down arrow under the Action column.
4.  Look for Make inactive and make sure your changes are saved. 

Give this a try and let me know how you make out. I'll be one message away in case you need anything else.