I have a part refund for a expense that I’ve already added to quickbook last week, how do I add the refund to the original expense?

Thanks for reaching out to the Community, @dleigh344.

You can enter a deposit to record the refund in QuickBooks Online (QBO). Just make sure to select the date and account that the money was received, as well as the category/item that the initial expense was related to.

Here's how:

1. In QBO, click the + New option at the upper left to create a Bank deposit. 
2. In the Add funds to this deposit section, select the account where the money was posted.
3. In the Received from field, choose the name where you got the refund.
4. Enter the expense account you used in the initial expense in the Account field, then the amount.
5. Hit Save and close to complete.

If you know more about entering deposits in QBO, consider checking out this article: Record and make bank deposits in QuickBooks Online.

Let me know if you have any other concerns or questions in the comment section below. I'll be more than willing to assist. Have a wonderful day!