How do you make the aging detailed accounts receivable report group the invoices per customer like the summary report.

Hello maund2001,

Welcome back to the Community. I trust that business is going well on your end. QuickBooks is a powerful program that simplifies the way you manage your accounting. I'll be happy to point you in the right direction so you're on the right track. 

The customizing options you're looking for aren't available in QuickBooks Online. I encourage you to send feedback about this to our engineers so they can include this in future update. You can send feedback within QuickBooks by clicking the Gear icon and navigating to Feedback. From here, you can type your feedback and send it to our developers. 

Feel free to ask other questions, I'm here to help. :)