The trouble ends here, @fayaddalia-yahoo. Showing the images of the items on your invoices is a great way to help your customer visualize the product easily. So I'd be glad to help you achieve this. 

In QuickBooks Online (QBO), having a product photos on your invoices can be done by utilizing the Attachment feature. Please refer to the following steps and get this done right away:

1. In your QBO account, navigate to the Sales menu and choose Invoices.
2. Once opened, click the Create invoice option.
3. Next, fill in the needed fields.
4. Then, scroll down to the Attachments section. This is where you can add the photos of your products. 
5. Click it and browse to add the image you need to attach. 
6. When finished, select Save and close.

You can browse this article for additional details about the feature: Attachments in QuickBooks Online.

It's also a breeze to run customer and sales report in QBO to monitor and track your income. To access one, you just need to select the Reports menu and scroll down to the Sales and customers section. 

If you have any other questions about managing your products and invoice forms, simply leave a reply below. I'll keep an eye out for your response and take every opportunity to provide help. Wishing your business continued success. Have a lovely day ahead.