After following your online instructions," placing logo on invoice", i am still unable to do this task, would appreciate your feedbackRegardsKeith Kember

Good day, @industrialcranes,

There are a few reasons why you can't upload logos in QuickBooks Online. Check the file if it meets these requirements: 

• The file must be in a .gif, .bmp, .png, .jpg, .jpe, or .jpeg format.
• It should not be larger than 10 MB.
• It has to be 24-bits or less in bit depth (or color depth).
• QBO only accepts square-shaped logos. Rectangles don’t work..
• Use the standard RGB color space. Note: If your logo is CMKY-formatted, convert it into an RGB image using tools (such as Adobe Photoshop) before you upload it to QuickBooks Online.

Check out this article for more information about importing logos: Add, customise, or remove logos on sales forms.

If you're using the correct file format, let's open your account in a Google Chrome browser and upload the logo again. Here's how:

1. Open Google Chrome then paste qbo.intuit.com on the search panel.
2. Log in using your Intuit credentials.
   
3. Go to the Gear icon, and select Custom Form Styles.
4. Locate and tap the Edit link for the invoice template.
   
5. In the Design tab, click on Make logo edits or Add your unique logo, then press Add a logo.
   
   
6. Select the logo you want, then hit Save.

Once successful, clear the browser's cache to refresh the system. Large data in the history can cause potential issues within the program. This article provides the steps on how to start the web in clean slate: How do I clear my browser cache and temporary Internet files?

If none of these steps work, I would recommend contacting our QuickBooks Care Team. They have the tools to escalate this behavior to our engineers for further investigation. Here's how to contact us: 

1. Click the (?) Help menu at the top right section of your QBO Dashboard.
2. Tap the Contact us button.

Please let me know what you find after tying out the steps. I want to make sure this issue is resolved, and I'm here if you need further assistance. Wishing you all the best! Take care.