Thank you for checking in with us, @Cbpilotcars.

Currently, the option to delete customers in QuickBooks Self-Employed (QBSE) isn't possible. However, we can edit the customer's name in the invoice.

Here's how:

1. Go to the Invoices menu.
2. Choose the customer you want to delete.
3. Click the drop-down arrow under Action.
   
4. Select Edit.
5. Click the Edit customer info link.
   
6. Change the name and hit Save.
7. Select the Subscribe to send drop-down arrow, then choose Save.

I'd also suggest sending feedback to our product developers. This way, they can add the feature in future updates. I'll show you how.

1. Go to the Invoice menu.
2. Select Create invoice.
3. In the Invoice window, you'll see the Feedback option in the upper right corner.
   
   

You can visit this link about adding products and services to an invoice: Create invoices in QuickBooks Self-Employed. It outlines the instructions to enter the transaction using a browser or a mobile device.

Let me know if you need further guidance managing your customers in QuickBooks. I'm always happy to assist. Take care.