How do you change the dating system for AR aging summary to use the invoice date not the due date
Being able to customize a report is one of the awesome features offered in QuickBooks. I'll be happy to steer you in the right direction with viewing the info you'd like to work with.
Based on what you've described, I recommend running the AR aging detail report vs the AR aging summary. The reason is that, the detail report provides more information and you have more customization options. I encourage you to follow the steps below in order to view the invoice date and not the due date:
From QuickBooks Online, navigate to the Reports tab and type Receivable in the search bar.
Select Accounts receivable aging detail from the pane that appears below.
Enter a Report period and Aging periods in the menu at the top and click the gear icon to customize the report