Force Platform
Log in to your website dashboard.
Click on "Company Information" located on the left-hand side menu.
Locate the section labeled "Company Logo". You should see your existing logo here.
Click the "Remove" button to delete the current logo, this will reveal the "Upload Logo" button please click on it.
This will present you with a new window that will let you choose it from your local drive, you can also drag and drop it on the larger section of it.
Save your changes. Choose "Publish" to immediately update the logo on your website or select "Needs Review" if your website operates under a compliance workflow.