Hello Roberto Verde,

There are a few things a want to clarify so we can get to the bottom of your concern. What specific report did you pull up and customize? Each report has their own corresponding ways of pulling up data. It depends on the sour of the information such as the fields, columns, or items.

If you pull up the Account QuickReport of a bank account, it should display the classes as long as it is also assigned to the transactions. You can open the transactions on the report you pull up and review if there are classes assigned.

If you're referring to something else, additional details such as screenshots and the name of the reports would be much appreciated.