Glad to have you back here in Community, @AmandaMoen.

I appreciate you following the steps presented by my peer above. However, to record the vendor's expense reimbursement accurately, you'll need to link the deposit to the bill credit.

To do that:

1. Hit on Vendors at the top menu bar.
2. Click on Pay Bills.
3. Select the Deposit that matches the Vendor check amount.
4. Press on Set Credits and apply the Bill Credit you created earlier then press Done.
5. Tick Pay Selected Bills.
6. Tap on Done.

You can check out the scenario number 1 found in this link for your reference on how to record vendors refund: Recording refunds you received from a vendor

I'm also adding here some articles that you can use about managing the receivables and parables of your business: 

• Accounts Receivable workflows in QuickBooks Desktop
• Accounts Payable workflows in QuickBooks Desktop

I'll be around to help if there's anything else you need. Just leave a reply below, and we'll take it from there. Have a lovely day!