Hi there, jkmacleantranspo,
QuickBooks Online (QBO) lets you upload a logo and customize it to your sales forms. You can change the size (small, medium, or large) but not the height and width.
The logo should be:
If the logo is CMKY-formatted, convert it into an RGB image using tools (such as Adobe Photoshop) before you upload it to QBO.
To customize the logo:
You can also refer to the Add, customise, or remove logos on sales forms article for more details. It lets you add, customise, and remove logos in QBO.
Should you need anything else, don't hesitate to leave a comment below. I always have your back.