How do I upload my logo to my profile? All attempts have failed to show it in the logo square.

Thank you for visiting the Community, @jandjmurrayenter.

I am here to help you upload the logo to your profile in QuickBooks Online. Before we start, make sure to meet the following logo requirements.

• 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

Just be guided that if your logo is CMKY-formatted, convert it into an RGB image using tools before you upload it to QuickBooks Online.

In adding the logo to your profile, here are steps that we should follow:

1. Go to the Gear icon.
2. Under Your Company, select Custom Form Styles.
3. At the upper right, from the New style drop-down, select the appropriate form.
4. If you want to upload a logo on an existing template, find the template then select Edit under the Action column.
5. Go to the Design tab, then select Add your unique logo.
6. Click the box with Add a logo +, then the + on the next window.
7. Locate and select the image you want to use then select Open. 
8. Once uploading is done, select Save, then Done.

For further guidance in adding a logo, here's a help article that you can check out: Add, customise, or remove logos on sales forms.

I'm also including these articles, that might help you in the future:

• Create an invoice.
• Customise your invoices, quotes and sales receipts in QuickBooks Online.

Please let me know in the comment section how it goes or if you have other concerns in QuickBooks. I'm always here to help. Have a good day!