Hi there, Kay. Yes, you can still use the old interface. I'll show you how to bring it back.
You can switch back to the old interface by navigating to the Gear icon. Here's a sample screenshot for visual reference.

In the future, you may want to explore the new interface and its updated features. For more details, check out this article: Explore QuickBooks on the Intuit Platform.
This thread will remain open for further queries. We're always here to help.