We set up our company using Express set up but how can we add the details now?

Thank you for choosing QuickBooks Desktop (QBDT) as your accounting partner, @lozbrewingco. Welcome to the Community. 

Let's go to the Company Information window so you can add the missing details of your business. I'll guide you how. 

1. Go to Company from the top menu. 
2. Select My Company. 
3. Click the Pencil (Edit) icon in the Company Information window. 
4. Enter the missing details in the Contact Information section. 
5. Click OK. 
6. From the left panel, go to Legal Information, Company Identification, Report Information, and Payroll Tax Form Information to add the missing info. 

The screenshot below shows you the last four steps. 

To help you get started in QBDT, please visit this website: QuickBooks Basics. This article contains links on how to set up your customers, vendors, employees, items, accounts, and other essential tasks for your company. Also, check out the PDF User Guide to help you get familiar with the product's features. 

I'll be right here to help if you need further assistance. I'm looking forward to your business' success while using QuickBooks, @lozbrewingco.