You might call them clients or accounts—QuickBooks calls everyone you work for or sell stuff to customers.
Add your customer information to QuickBooks first, so you’ll have a handy list to choose from when you’re creating invoices and sales receipts.

Got a whole bunch of customers in your Contacts, or someplace else? You can:

• Sync your Contacts with QuickBooks
• Import your customer info
• Add your customers one at a time

Rather than keeping your customer contact info in a number of places, you can keep it in Contacts and sync it with QuickBooks. See Contact Sync in the User's Guide for details.

This video shows you how to import your customer info, if you want to go that route.

Would you rather enter your customer information one customer at a time, and add more details while you’re at it? This video shows you how: