I'm here to help you send an invoice without the balance forward, Graeme.

Let's edit the sales form link to that invoice to remove the account summary. Here's how:

1. Go to Gear and select Custom form styles.
2. Find the template you're using, then click Edit. 
3. Click the Content tab.
4. In the form preview, click the middle section.
5. Uncheck the Show on invoice checkbox.
   
   
6. After that, select Done.

For more details, please see this article: Customise Invoices, Quotes, and Sales Receipts in QuickBooks Online.

Additionally, I've added this article that'll help you gently remind customers about invoice due dates: Send Reminders Automatically or Manually in QuickBooks Online.

Please add your comment below if you have other concerns and questions about managing invoices. We've got you covered. Keep safe!