Thanks for getting involved with this thread, designhoa.

I can certainly understand how an ability to delete customer profile in bulk could be useful and have submitted a suggestion about it as of today.

You can also submit your own feature requests while using QuickBooks.

Here's how:
 

1. In the top menu bar, go to Help, Send Feedback Online, then Product Suggestion....
   
   
    
2. Choose a Type of Feedback and Product Area (optional) from your available drop-down menus.
   
   
    
3. Enter any suggestions/feedback in the Here is my suggestion: field.
   
   
    
4. If you'd like, include your name/email in the My name is: (optional) and My e-mail address is: (optional) fields.
   
   
    
5. Select Send Feedback.
   
   

Your feedback's definitely valuable to Intuit. It will be reviewed by our Product Development team and considered in future updates. You can stay up-to-date with the latest news about your product by reviewing Intuit's Product Updates webpage.

For the time being, you can delete customer profiles one at a time using the steps shared in Jovychris_A's post.

If there's any additional questions, I'm just a post away. Have a lovely Thusday!