It's important to be able to set the labels you want to easily fill in the details when adding a new customer, @azpcp. I'm here to share details about this.
In QuickBooks Desktop (QBDT), the option to set new default labels in the Address info window when creating a customer is unavailable. Each time you create one, you'll have to manually change it. For reference, check out this resource: How to set up customers and items & services in QuickBooks Desktop.
Once everything is fine, your next step is to process your customer transactions such as invoices. For a detailed guide, refer to this article: Create an invoice in QuickBooks Desktop.
Leave a comment if you have any questions regarding the default selection while setting up customers. I'm here to help ensure your goals are achieved. Take care.