Thanks for always reaching out to the Community, jvvci05.
As I checked in our system, we currently have an investigation about invoice reminders not being sent. I suggest reaching out to us so we can aff your account to the notification list. Once there are updates we will notify you through email.
Here's how to contact us:
- Select the Help icon at the upper-right.
- Click Contact Us.
- Enter a brief description of your concern something like invoice reminders not sent to the customer.
- Click Let's talk and choose the convenient way you'll want to get in touch with us.
If you have the QB Assistant option, just enter talk to a human twice and click Contact Customer Support. Follow the onscreen instructions until you'll see the options on ways you can contact us.
I'll be adding this link that will give you more details about our available hours and different support types: QuickBooks Online Support.
Once the issue is resolved, you can do next is to resend the invoice reminders manually to existing transactions or you'll want to create and email your customer statements of open invoices and aging ones.
For other concerns and helpful tips, please reply to this thread. I'm always here to help you. Take care!