Hello Jmryan,
Welcome to the QuickBooks Community. I'll be glad to help share more info about using the invoice templates in QuickBooks Desktop.
The program provides the flexibility that allows you to customize/use more than one invoice template for your invoices. Although the option for using the default template appears, you can still use a different template. I encourage you to check out the following article for more info on how to: Use and customize form templates. In case you're having issues with the templates, here's an article that shows you how to: Fix common issues when you use and customize templates.
Let me know if this info helps by leaving a comment below. I'll be one message away in case you need anything else.