In QuickBooks Online, there are few things you need to remember before adding logos. Here are the following:
a .gif, .bmp, .png, .jpg, .jpe, or .jpeg file
smaller than 10 MB
24-bits or less in bit depth or colour depth
square-shaped, since rectangles don’t work
using the standard RGB colour space
You’ll want to convert the logo first into an RGB image using tools such as Adobe Photoshop before you upload it to the program if it’s CMKY-formatted.