Thanks for posting here again, Lester.

I'm joining the thread to share additional insights to your invoicing concern.

For now, the option to let customers pay through statements is not yet available, but our Point of Sale team wants to hear from you. To log a suggestion to add payment links to customer statements, click on Send Feedback from the Help menu of your QuickBooks Point of Sale company file. Then, choose a category and enter your comments or suggestions before submitting. While we can’t promise a personalized response to every submission, rest assured our developers read all feedback and use it to improve future releases of Point of Sale.

Also, regarding the system not marking the email later option automatically, please contact our Technical Team for further assistance. They can diagnose the company file and help you further with your sales processing. Click this link to contact our agents: Contact Payments or Point of Sale Support

Please reach out to us anytime if you need further assistance with the Point of Sale processes. I'd be delighted to share additional insights whenever you need one. Have a nice day and take care.