How do I create sub categories for my expenses in chart of accounts?

Thank you for posting in the Community, Steve. I'm here to help you create subcategories in your expense account.

QuickBooks Online allows you to add a subaccount under a parent account. It helps better categorize your transactions. Here are the steps to create a subaccount:

1. Go to Transaction, then select Chart of Accounts.
2. Select New.
3. Click on the Account Type dropdown to choose the account type. 
4. Select the Detail Type to specify the type of account that you want to add.
5. Enter the name of the account in the Account Name field.
6. Check the Make this a Subaccount box and choose the Parent account.
7. Select Save and Close.

Additionally, it's best to keep your Chart of Accounts simple and organized. QuickBooks makes accounts inactive instead of deleting them, so you can still access past transaction data for reporting purposes.

If you have any further questions or need additional help creating a subaccount under expense in QuickBooks Online, feel free to reply to this post. Have a great day.