Hey there, @LalaineBalaba.
It's great to see you back in the Community. Allow me to give you some information to help answer your question.
Based on the details you provided, I recommend letting a user with full access or the admin turn on the class feature. This will help resolve the issue and they should have the option available to them.
In the meantime, here's a guide that can help you in the future: Set up and use class tracking in QuickBooks Desktop.
Feel free to ask me any other questions that you may have. Have a good one!
