Thank you for taking part in this discussion, Vanscabs. I can help you rectify the logo size on invoices. This way, they'll reflect the right size when emailing the transactions to customers in QuickBooks Online (QBO).

If you've already modified the size of the invoice in your custom transaction template, you'll want to access the company file in an incognito or private browser. By doing so, we can determine if the changes made to the template flows seamlessly. To begin, use these shortcut keys so access a private browser:

• Safari 11 or newer: ⌘+Shift+N
• Chrome: Ctrl+Shift+N
• Safari: Command+Shift+N

Once done, create an invoice and utilize the customized template with the modified logo size. You'll then complete the details inside the transaction and email it to a sample customer in QBO. This way, you can verify if the logo dimension or size shows the preferred size. Once fixed, you'll want to clear your browser's cache to restore the program to its default function. Refer to this article for more details:  Clear cache and cookies to fix issues when using QuickBooks Online.

I also recommend accessing your company file through other compatible browsers. Refer to this article to see the list of compatible browsers in QuickBooks Online: Other browsers.

If the issue persists, you can reach out to our Live Customer Care Team so they can access your account in a secure environment and determine the root cause of this issue. They'll also provide further instructions to help you rectify this situation. For more details, please see this page: Get help with QuickBooks products and services.

Additionally, here's a reference to help you in handling customer invoice payments in QBO: Record invoice payments in QuickBooks Online.

I assure you that I'll be here every step of the way to resolve your concerns regarding the invoice logo. I encourage you to utilize the comment section so I can communicate and provide the needed details. Stay safe.