Hi there, @kelsey5.

Let me shed some light on you.

At the moment, there's no update on how to get back to the old sidebar.

In the meantime, you can submit feedback to our engineers to submit your idea about the updates made by QuickBooks.

Here's how:

1. Go to the Gear icon.
2. Select "Feedback"
3. Enter your suggestion and click "Next."

I'll provide an article to help you navigate useful links: QuickBooks Help articles site.

Click the Reply button below if you have more questions about QuickBooks Online's new update. I'll be willing to lend a hand. Keep safe.