Hello there, @Jane MC.
It seems that you've posted your concern twice. My colleague addressed the issue about QR codes on your invoices in your first post. Kindly refer to this link: https://quickbooks.intuit.com/learn-support/en-us/reports-and-accounting/re-how-can-i-add-a-qr-code-....
In the meantime, I'm adding this article to further guide you in managing your business's growth using QBO: QuickBooks Help Articles. It includes topics about data security, banking, and expenses, to name a few. You can click the + More topics button to view other selections.
You can count me in if there's anything else you need. I'm just around to help. Take care always.
