I only want the automated reminders to be sent to customers during the hours of 0800 and 2100 EST. How do I make this happen?

Hello there, michael. The option to set automated reminders in hours is unavailable. Let me provide more details below.

In QuickBooks Online (QBO), we can only set automated invoice reminders days before and after the due dates. Since you want the reminders sent on those specific hours, you can do it manually or look for a third-party app through the QuickBooks Online App Store.

To send reminders manually:
 

1. Go to the Sales menu, then Invoices.
2. Locate the invoice for which you'd like to send a reminder.
3. From the Receive payment dropdown, select Send reminder.
4. Customize your message and select Send.
    

Refer to this article for details on managing invoice reminders: Send invoice reminders automatically or manually in QuickBooks Online.

Additionally, please visit these articles for future reference in customizing invoices and managing invoice payments in QuickBooks:
 

• Customize invoices, estimates, and sales receipts in QuickBooks Online
• Record invoice payments in QuickBooks Online
   

You can check our team at QuickBooks Live Expert Assisted to help you with best practices and guidance on getting the most out of QuickBooks Online, especially with managing invoice reminders.

Feel free to get in touch for any inquiries about sending reminders in QuickBooks. We're always here to help you, michael.