How do I make a JE for the sale of a current asset for a profit using a customer credit?

Thanks for getting in touch with the Community, May-I-Ask.
 

You can make journal entries using your + New button.
 

Here's how:

1. In the left navigation bar, click + New.
2. Choose Journal entry.
3. On your first line, choose an account from the Account drop-down list.
4. If you need to debit or credit the account you selected, enter your amount in the correct column.
5. From your next line, pick the other account you're moving money to or from. Depending on if you entered a debit or credit on your first line, enter the same amount in your opposite column.
6. Confirm the amounts in your Credit and Debit columns on both lines match. This means the accounts are in balance.
7. Enter any necessary information in your memo section so you know what the entry's for.
8. Select Save and close.

I'd also recommend working with an accounting professional to assure the correct accounts are selected and that everything's entered properly. If you're in need of one, there's an awesome tool on our website called Find a ProAdvisor. All ProAdvisors listed there are QuickBooks-certified and able to provide helpful insights for driving your business's success.
 

I've also included a detailed resource about working with journal entries which may come in handy moving forward: Create a journal entry
 

Please don't hesitate to send a reply if there's any questions. Have a wonderful day!

Hi Zack, thanks for your reply. My apologies, my question wasn't clear. I was looking for help on the accounting aspect of it.  Here is an example:  Customer Bob has 40K credit from a return of goods and want to buy current asset "X" for 40K.  Asset "X" is on the books for 30K.  JE: Debit Bob's liability 40K; Credit asset 30K; What account would the remaining 10K be credited to? Would it be Refunds/Allowances which is where the original 40K return went?