Hi, @andrewh2.
It's nice to have you in the Community. I'm here to help on how you can edit the layout of your invoices and estimates in QuickBooks.
Creating a custom template for specific transactions is fast and simple. To know more about the template styles and step-by-step guide, please refer to this article: How to customise invoices, estimates, and sales receipts.
That should do it. If you need other references in the future, you can also check out our help site: Help articles for QuickBooks Online.
Keep me posted if you have other questions about customising your forms. I'm here to help.