Thank you for getting back to us, JS2138. 

As mentioned by my colleagues above, the new invoice layout is only available for the new QBO account. However, you've stated that there is a message you were asked to switch back, yet you never used the new format. It possible you experience a browser-related issue. 

To rule this out, you can open your QuickBooks using an incognito or private window. This can help us rule out any cache-related issue that might've caused the problems. Use these shortcut keys to open it: 

• Google Chrome: Press CTRL + Shift + N.
• Safari: Press Command + Shift + N.
• Mozilla Firefox: Press CTRL + Shift + P.

If the steps above work, I suggest clearing your browser's cache to boost browser-related issues. Some stored data on your browser can impact the data being transmitted, thus causing some unusual responses. 

In case private browsing doesn't work, I'd recommend using different browsers. They'll provide you with the best and most secure experience with QuickBooks. For more details, please see this article: System Requirements For QuickBooks.   

You can refer to this article, where you can customize invoices, estimates, and sales receipts in QuickBooks Online.  

If you'd like to utilize the reports to see your sales, expenses and other data, I'll add this article if you need help in the future: Run reports in QuickBooks Online. 

Do you have more questions about using templates or layouts? Or do you have any concerns regarding QuickBooks? Let me know, and I'll help you out.