Hi there, @ AL_67.

Journal entries are used as the last resort for entering transactions. You also use this when you transfer money between income and expense accounts. Or, transfer money from asset, liability, or equity to any income and expense accounts. 

Once you assigned a class on each line item on the Journal Entry, save it and re-run the report. You're unable to change the class by creating entries. You can open the journal entry and make sure that you've assigned a specific class to it. Also, you can open the transaction and change the class manually.

Then, when you pull up the Sales by Customer report, it will show the transaction's correct class. You can also customize the report to help you focus on the details that you want.

If you're unable to assign a class on each line item, you can review your class tracking settings. Here's how:

1. Go to the Gear icon.
2. Choose Account and Settings.
3. From the Advanced tab, scroll down to the Categories section.
4. In the Assign classes drop-down, choose One to each row in transaction.
5. Hit Save, then Done to record the changes.

You can browse these articles to learn more about customizing your reports:

• Run reports by class
• Filter, sort, or total reports by Class

If you have any other questions about this. I'll be keeping an eye out for your response. Keep safe always.