Good day, andrea25.

We're unable to run the AP Aging report based on the bill date instead of the due date, unless if the Bill and Due dates are the same. 

You might want to run the Transaction List by Supplier report. Then, customise it to add a Due Date column and group it by Day. Here's how:

1. Look for the Transaction List by Supplier report.
2. Click Customise in the upper-right hand corner.
3. Go to the Rows/Columns section and select Day for Group by.
4. Check both Due Date and Create Date boxes.
5. Proceed to the Filter section.
6. Check the Transaction Type box and select Bill.
7. Click Run Report.

We're always here if you need anything else. The Community is always here if you require additional help with QuickBooks.