How can I enter a job address in Quickbooks and have it bring up that customers account?

Hello there, @info288.

At this time, entering a job address and associate it to the customer's account isn't available in QuickBooks Online.

As a workaround, you can utilize the Shipping Address field or add a custom field for the job address. However, this won't associate with a customer's account.

Here's how:

1. Click the Gear icon, then select Account and Settings.
2. Select Sales from the left menu.
3. Go to the Sales form content section.
4. Under the Custom fields, add job address.
5. Hit Save, then Done.

I'm adding this article for more details: How to add custom fields to invoices.

You might also want to check out these articles to learn how to manage customers and customize your sales forms in QuickBooks Online: 

• Add and manage customers in QuickBooks Online
• Customize invoices, estimates, and sales receipts in QuickBooks Online

Please know that I'm just a reply away if you need any further assistance with QuickBooks Online. Have a great day ahead.