Do businesses print out invoices to track them, or can I be confident they are all tracked online by qb?

Hello wendybrown2000,

Welcome to the cloud! QuickBooks is Online makes it easy to access your account and get your work done from anywhere with an internet connection. I'll be happy to share more info and help steer you in the right direction. 

To get started, it's important to note that QuickBooks automatically stores your invoice on the cloud and you can access these invoices at any time. You're more than welcome to print out the invoice, however, you can also enjoy the benefits of QuickBooks saving and tracking your invoices. 

Since you've just migrated from QuickBooks Desktop, here's a helpful article with more info on: 

Getting started with QuickBooks Online. 

Let me know if this info helps. I'll be a message away in case you need anything else. Otherwise, I wish you a great rest of the week!