Hello, ckline.

I have the steps to help you delete a reminder. 

Are you referring to the transaction reminders? If so, you'll want to go to your Recurring transactions list to delete a reminder. Here's how:

1. Click the Gear icon, then choose Recurring transactions.
2. Find the reminder you want to delete. 
3. Under the ACTION column, click the arrow icon (beside Edit).
4. Choose Delete.

In case you need help creating another recurring transaction, open this article for the steps.

However, if you're trying to delete the reminders under Tasks, you can simply click the X button when hovering over them. This screenshot shows you where to find it:

Note: You might miss out on important notifications and corrections. I recommend reviewing them by clicking the View link before deleting. 

Ready to record new sales transactions for your customers? You can check out the guides here. 

I'm always around to help, so let me know if you have other questions for QuickBooks Online. I'll respond to your replies as soon as possible with guides and pointers.