Hello, Mifal May.

Before we proceed, I'd like to ask for clarifications on your reply. 

Are you trying to add another set of accounts in the Open Invoices report? Or are you trying to add columns to it? 

Also, are the paid invoices showing up when you pulled it up? Or are those just partially paid invoices? 

More details would definitely help me build the report you need for your invoices. 

Looking forward to your reply soon!