Thank you for bringing this out to the community, Sara

I'm here to provide you with information on how to update the category of your transaction.
 

Follow these steps:

1. Go to Transaction and select Bank transaction menu.

2. Click on the Categorize tab.

3. Choose the transaction from the Added or Match column.

4. Change the category under the Account column.

5. Click on Save and close.

Once done, repeat the process from steps 3 to 5 for the remaining transactions that you need to update the category.

Additionally, I've added this article to help you categorize your transaction: Categorize transaction in QuickBooks Online.

If you have more questions related to your transactions, please don't hesitate to reply to this post. We're available 27/7. Have a great day.