How to add logo to Amazon

To Upload your logo;

In Seller Central top right corner;
From ‘Settings’ select the ‘Your Info & Policies’ link.
On the ‘Your Information & Policies’ page, click ‘Profile’.
Locate the ‘Seller Logo’ section, and click the upload button.
For a logo to be displayed, the image size must be exactly 120 by 30 pixels, and the file size must be no more than 2 megabytes (mb).