Hi there, @OVWC.

At this time, the option to have all statements/invoices for all customers to have the same due date is unavailable in QuickBooks Desktop (QBDT). 

I can see how this feature would be beneficial to your business. In the meantime, I suggest sending feedback straight to our product engineers. 

To send feedback, here's how:

1. Go to the Help menu at the top.
2. Select Send Feedback Online.
3. Click Product Suggestion.
4. Choose a feedback type and product area on the QuickBooks Feedback window. 
5. Enter your feedback, name, and email address (optional).
6. Once done, click on the Send Feedback button.

You may also visit this page or go to the What's New section on your QBDT to get updates on our latest news including product improvements. 

For future reference for tips and related articles about the "How Do I" steps in QBDT, visit our QuickBooks Community help website.

If you have any additional ideas or concerns, please let me know. Take good care.