Under Sales then Customers, I click on a specific customer name to see their open invoices. The open invoices are there but no invoice date. Why is it doing this?

I'm here to provide troubleshooting steps to help you get back to working order, @msclean.

First of all, make sure to turn on the service date feature in the accounts and settings.

Here's how: 

1. Click the Gear icon, then select Accounts and Settings. 
2. Navigate to Sales and then locate Sales form content. 
3. Click the Pencil, then toggle the Service Date. 
4. Once turned to green, click Done. 

After this, go to Custom Form Styles and ensure that the date is included in the template. 
 

Here's how:

1. Go to Custom Form Styles, click New Style, and choose Invoice. 
2. You can select any template, then go to Content.
3. Click the body, then toggle the Date. 

Once done, you can now create an invoice with a service date or date field. 

Additionally, you can check out this article to learn the new estimate and invoice layout: See what’s new with estimates and invoices in QuickBooks Online.

Furthermore, this article can help you learn how to personalize your invoices: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Moreover, once you've received your invoice payment, this article can help you learn how to record it: Record invoice payments in QuickBooks Online. 

If you encounter trouble when accessing your other sales forms, please don't hesitate to leave a reply below. I'm always here in the Community to provide prompt assistance.