Let's make sure you'll be able to test a rule and check if it does match the transactions, Arrow98.

 It's a great way to dive in and experiment with features and options you might not feel comfortable trying in your own QuickBooks Online account. You can use our test drive so you can test certain things such as creating the bank rule.  

You can manually enter older transactions and use them while working with your test drive. Also, you can create your own bank account for testing. 

In addition, QuickBooks downloads the latest bank transactions automatically and tries to match them with what you've entered in QuickBooks. For your reference, I've added this article for your guide: Categorize And Match Online Bank Transactions In QuickBooks Online.

Please touch base with us if there's anything else you need with the bank rule. Don't forget, we're here to help you as always.