It is currently not possible to have multiple logos for your organization. You would be able to upload your company’s logo in the Organizational Profile section which would be used in all of your transactions.
However, if you own a subsidiary, and if you wish to use its logo on your invoice templates, we would suggest you to upload that logo as a Background Image.
Please follow the instructions below to add a background image to your quote/invoice templates:
Online accounting software
for small businesses.