I understand the urgency of this matter to your business, sales-the sweet. Allow me to add details about formats in preparing invoices.

Before printing invoices in QuickBooks Online (QBO), the system automatically sets them up in portrait mode as designed, and there is no direct option to switch to landscape format.

Alternatively, you can manually change the orientation settings of your printer so you can print your invoices in a landscape format. This option is available on the Microsoft Edge browser.

 You can follow the steps below for guidance:

1. Locate and open your invoices, then click Print or Preview. 
2. Select the Print icon, then select Landscape in the Layout section in the left navigation menu.
3. Once done, click Print to complete the process.

I've included a screenshot below for your visual reference.

After adjusting the settings, preview your invoice to check. 

As this is a functioning design, I can't process an escalation. Instead, you are welcome to provide suggestions to our product development team. They'll carefully review your idea and may consider it for future updates. 

Here's how to submit your response:

1. Select the Gear icon, then choose Feedback.
2. Type in your product suggestions.
3. Select Next to submit.

We truly appreciate your valuable insights and acknowledge your contribution towards improving our product.

Finally, I've also added this article to help you in receiving invoice payments from your customers: Record invoice payments in QuickBooks Online

If you need further help in printing your invoices in a landscape format. Don't hesitate to get back on this thread. I'm always here to help!