Hi there, @christen. I'm here to help turn off invoice reminders to your customers.
For this, you'll have to turn off Automatic invoice reminders. I'd like to add that turning off automatic invoice reminders will stop email notifications for all your customers' outstanding invoices. Here's how:
You're always welcome to ask questions in the Community. If you have further inquiries about turning off invoice reminders, feel free to reply below. Take care!