You can use the Attachment field to add photos on your invoice, Rusty.
Here are the detailed steps on how to do it:
- Go to + New, then Invoice.
- Choose the customer and fill in the necessary details.
- Click Attachments.
- Browse and select the document you want to attach.
- Hit Open, then Save and close.

For more information about attachments, refer to this article: Add or delete attachments in QuickBooks Online.
Additionally, to learn how to enter money you received from customers, visit this material for guidance: Record invoice payments in QuickBooks Online.
We're here to help ensure your invoicing processes run smoothly in QuickBooks Online. Feel free to revisit this thread if you have further concerns regarding adding photos to your invoices. The Community is always available to assist you.