I appreciate you clarifying the details of your invoice query, @FlyGlobal. Let me join this thread and share some steps you can perform to complete your tasks.

In QuickBooks Online (QBO), you can create an invoice template showing only the needed data. Let me walk you through the steps for a seamless process:
 

1. In your QBO account, go to the Gear icon, then select Custom form styles.
2. Click on New style, then select Invoice. Tip: Click on Edit if you have an existing invoice template. 
   Note: Images contain dummy addresses and names.
   
   
    
3. In the Design section, enter the template name.
   
   
    
4. Go to the Content section, then select the Table to customize. Tip: You can also customize the Header and the Footer.
   
   
    
5. To show only the amount, untick the boxes for Products/Service, Description, Quantity, and Rate. 
   
   
    
6. Once ready, click on Save.

Kindly see the image below for a visual reference:


 

To use the invoice template permanently, you can make it your default.


 

For detailed information, kindly visit: Customize invoices, estimates, and sales receipts in QuickBooks Online.
 

After which, you can now proceed to send invoices to your customer.

You might also consider reading this article, which provides guidance on creating templates for transactions that occur regularly: Create recurring transactions in QuickBooks Online.
 

I'm always open and ready to assist you if you require further assistance or have additional QuickBooks-related queries. Just let me know by adding a reply below. Take care.