Thank you for joining this thread, @ GDS.

Currently, we're unable to go back to the old invoice interface once we switch to the new invoice layout. However, I see how this would be beneficial on your end to utilize the old layout.

Moreover, I appreciate your effort in sending suggestions. Yet, for this feature to be available, we recommend submitting direct feedback again to our Product Development Team to have this feature back. They might add this to our future product updates. 

Additionally, if you want to personalize your invoice or any of your sales forms, you can read this article: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Feel free to return here if you have additional questions about your invoice form. I'll be willing to help you.