Hello Im new to quickbooks. i accidentally exported all my phone contacts to customers. I need them all be delited

Hello there, office98.

In QuickBooks Online, the option to delete a customer is by making them inactive. Here's what you'll need to do:

1. In the left navigation menu, click Sales. 
2. Go to the Customers tab. 
3. Put a check mark on the box beside the customer's name.
4. Click the Batch actions drop-down, then choose Make inactive.
5. Select Yes to confirm the deletion.

Keep in mind that when you delete a customer, the transactions associated with them, remain on your company data in Reports. Also, when deleting a parent customer, the sub-customers will also be deleted.

If you need tips in the future, visit our QuickBooks Help Articles site. 

Please keep posted if you have any other QuickBooks concerns, I'll be always here to help you. Wishing you the best!