Hi there burdman75,
Sending statements is a great way to make sure your clients know the balance they owe you. Quickbooks Online makes it easy for you to create and send statements in a few steps. I can assist you with adding your logo to statements.
The statements in QuickBooks Online take the logo that is based in your Standard form style. In order to add the logo to the statements, you can modify that form style to include your logo. to accomplish this, navigate to the Gear Icon, then Custom Form Styles. Click on Edit beside the Standard form, and click on Make logo edits. You can then select an image file to use for your logo, then click Done to save.
I hope this helps you with adding your logo to your statements. If you have any more questions, feel free to reach out here.