Select Categories → Expense Categories in the left vertical menu.
If the menu is not visible, click the menu icon in the top-left corner.
In the mobile app, tap the menu icon in the top-left corner, then select Expense Categories.
Click the expense category group you want to delete, then select Delete Category Group from the popup menu.
An expense category group can be deleted only if it doesn’t contain any expense categories. If the group contains expense categories, a warning message will appear and the group won’t be deleted.
If the expense category group is empty, it will be deleted immediately, without a confirmation dialog.