Thanks for reaching out to the Community, Danny.
Let me share information that help you clarify things with regards to the option to switch to the old Layout in QuickBooks Online (QBO) Essentials.
The option to switch to the old layout is not a glitch since US QBO customers will be migrated from the old/classic invoice/estimate experiences to the new experiences. This notification outlines the new features and changes. As migration progresses and more features become available on new experiences, the option to opt-out will no longer be available to customers.
Eventually, it's not necessary to upgrade to a QuickBooks Essentials subscription since it will also be migrated to the new invoice experience with no option to go back to the old layout. However, there are still QuickBooks Essential users who have the option to switch back to the old layout since the updates are still ongoing.
If you're still adapting to the new layout, I suggest using a third-party app in the meantime to help you manage your invoices and estimates more efficiently. You can search for applications through the Apps menu of your QBO, then click the Find Apps tab. You can also look here in our QuickBooks Online App Store.
I'm attaching these articles for future reference about the latest updates regarding invoices and estimates and further guidance in personalizing your sales forms in QuickBooks:
Let me know if you have other questions regarding invoice templates and other sales forms. I'll be happy to help you.
