Thanks for visiting the Community Wocair,

Right now, we can’t directly edit the statement to combine two different sites. You can customize it to add your logo using the Standard template though.

Here are the steps:

1. Click the Gear icon located in the upper right-hand corner.
2. Under Your Company, click Custom Form Styles.
3. Click the Edit link of the standard template.
4. From the Design tab, click Make Logo Edits to expand.
5. Click the box to upload your logo.
6. Choose the Size and Placement.
7. Click Done.

You can check this article for more information: Create and Manage Statements.

I'd also recommend sending feedback to our product engineers by clicking the Gear icon, then selecting Feedback. 

Please leave a comment below if you have additional questions about QuickBooks Online Statements.