How do i add my own expense category.

Hello there, @john-fullonadven?

Are you trying to add an expense account to your QuickBooks Online company? If so, I suggest going to your Chart of Accounts and creating the category from there. Here's how:

1. Open the Accounting menu, then select the Chart of Accounts tab.
2. Hit the New button.
3. Set the Account Type to Expense or Other expense.
4. Choose a Detail Type.
5. Fill in a name for the new expense account.
6. Once done, hit Save and Close.

On the other hand, if you're wanting to create a category specifically for the goods or services you get from your supplier You should access the page for All lists and add the category from there. Here is a detailed procedure:

1. Open the Gear icon, then choose All lists
2. Click on Product categories.
3. Select the New category button.
4. Enter a name for the new category, then hit Save.

You can assign the new category under the Category drop-down when editing or creating a service item.

For future reference, check out this guide to learn more about handling bank feeds so you can categorise or match your bank record with QBO: Connect your bank feeds using Open Banking.

Don't hesitate to comment back if you need extra help with QuickBooks or managing categories. I'm always ready to back you up. Have a great start of the week!