Thanks for posting in the Community. I'd be delighted to assist you with flipping your checkbooks register so that the most recent transactions appear at the top.
QuickBooks Online offers multiple ways to filter and sort your register, including ascending and descending order. Here's how to flip your register to sort by transaction date:
I've included a brief video to serve as an example:
For additional information on this, including sorting options, I recommend the following article: Sort A Bank Register In QuickBooks Online.
That'll do it. I'm confident that you'll have the checkbook register sorted in no time.
As always, I'm only a post away if you need anything. Cheering you to continued success in all of your endeavors.