Thank you for reaching out to us, WalH.
I'll help by sharing information with you about the report you need.
In QuickBooks Desktop, you can enable the Class tracking feature. That way, you can assign classes to your transactions to tag which business they belong to. Then, you can run the Profit & Loss by Class report to know how much you're making in each class/business.
Please note that this will take a lot of effort because you will want to assign classes to all your transactions individually. There is no batch option or a shortcut for assigning classes.
If you have other questions in mind, you can always go back to this thread. Have a good one!
