how can I run an AR aging detail report to show the due date by customer terms not the due date does not reflect the terms

Thanks for joining the Community space, @SprayDry. Let me help you with your accounts receivable aging summary report.

The A/R Aging detail report will show the past due balances of each transaction. This report will show you all outstanding invoices and sort them by the due date. Depending on the payment terms you have set for your customers, you will see those due in 0-30 days, 30-60 days, 60-90 days, and over 90 days past due.

To determine by terms of your A/R Aging Detail report, you can follow the steps below:

1. Go to the Reports menu.
2. Select Customers & Receivables, and A/R Aging Detail.
3. Click the Customize Report button to customize the report's data.
4. In the Display column, put a checkmark behind the Date, Terms, and Due Dates.
5. Click OK.

Also, you can export it to an Excel file so you can modify and add other details on the report. You'll just select Excel on the toolbar and choose the Create New Worksheet option to create a new Excel workbook. 

Once everything is all set, you may also want to check out this article as your reference to guide you on how QuickBooks generates reports and see the complete list of available ones in QBDT: Understand reports.

Please let me know if you need anything else. The Community and I will be here to help you. Take good care.