I can help you modify your class list in QuickBooks Online (QBO), Aleksandra.
If you already have data associated with the class, there is no need to delete the transaction as changes will automatically apply.
These are the steps on how to modify your class list:
- On the Gear icon ⚙ , choose All lists.
- On the Lists, click Classes.
- Under Actions, select the drop-down arrow ▼ on the class you want to edit.
- Press Edit.
If you delete a class that contains data, it will appear as deleted in reports along with the transaction.
Also, you may check out this article for you to have more information on how to manage your classes: Create and manage classes in QuickBooks Online.
In addition, feel free to check on this article for you to learn how to create a budget by class: Set budget targets for each class in QuickBooks Online.
Let me know if you have any further questions about modifying your classes. I'll be sure to help you out anytime. Take care.