Welcome to the QuickBooks Community, @sandie289.

I'm here to make sure you have an accurate record of your books in QuickBooks Online (QBO). 

Below are the steps you can perform to enter a debit card return. 

To start, you'll need to create a vendor credit to hit the expense accounts used for the vendor:

1. Go to the + New button.
2. Choose Vendor credit.
3. From the Vendor dropdown, select your vendor.
4. Enter the Category details or Item details depending on how you record purchases with this vendor.
5. Then, click Save and close.

Next, you'll have to deposit the money you got from the refund:

1. Navigate to the + New option.
2. Click Bank Deposit.
3. In the Account drop-down menu, choose the account where you got the refund.
4. Fill in the needed fields.
5. Then, select Save and close. 

Once done, you now need to connect the bank deposit to the vendor credit:

1. Click + New.
2. Choose Pay Bills.
3. Select the bank deposit you just created. You’ll see the amount of the vendor credit in the Credit Applied field. The Total payment should be $0.00.
4. Select Save and close.

For your reference, please see this article: Enter a refund from a vendor. 

However, if there's no bill made, you can create an expense transaction and bank deposit it directly. 

Monitoring all of your vendor transactions in QBO is easy. To do this you can run either a Balance detail report or a Transaction detail report. For the detailed steps, please visit this page: Print a customer or vendor register.

If you have more questions about entering debit card return in QBO, feel free to click the Reply button below. I'll get back to you as soon as I can. Have a good one.