Hello there, Kiki2.
Thanks for keeping posted. I appreciate you following the steps provided by my colleagues to get this working.
Since the doing all the steps did not resolve the problem with adding class to your transactions, I recommend you get in touch with our QuickBooks Customer Care Team. They have tools such as screen-sharing that can pull up and check your account and further investigate. They can also perform more troubleshooting steps that can help resolved this.
You can check out this article for the detailed steps on how to reach them: Contact the QuickBooks Desktop Support Team.
Please let me know how it goes or if I can be of additional assistance. I'm always here should you have any follow-up questions or concerns.
