Hello there, @amirtoptier.
You'd just want to make sure to use the same expense account used in buying the replacement mirror. This way, it will offset the original expense transaction. I can walk you through how to do it.
- Go to the New (+) icon.
- Choose a Bank Deposit.
- From the Bank Account drop-down, choose the account where the actual check is deposited.
- In the Add funds to this deposit section, enter the payment details.

- Click the Save and Close button
You can read through this article to learn more ways on how to record your refund transactions: Enter a refund from a vendor.
Also, I'd recommend consulting your accountant once these steps are complete. They'll be able to guide you in determining the best way to handle your expense transactions.
I'm only a few clicks away if you have any other questions. Wishing you and your business continued success.