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Let's transfer credit from one customer to another customer.

The first step is to create a clearing account. You will use this to move money from one account to another account when you cannot move the money directly. 

1. From the Lists menu, select Chart of Accounts.
2. Right-click anywhere in the Chart of Accounts, then select New.
3. In the Add New Account window, select the Bank radio button.
4. Select Continue.
5. In the Account Name field, enter Clearing Account, Barter Account, or Wash Account.
6. Do NOT enter an opening balance.
7. Select Save & Close.

Next is to create a journal entry to move the credits from one customer to another.

Here's how:

1. Go to the Company menu and select Make General Journal Entries.
2. Fill out the fields to create your journal entry. Make sure your debits equal your credits when you’re done.
3. Select Save or Save & Close.

Then, you can link the payment or credit to the journal entry. Follow the steps below for your guide:

1. From the transactions list, double click the credit memo.
2. Select Use credit to apply to invoice.
3. Put a check mark on the journal entry then select Done.
4. Choose Save & Close.

Once done, you create a JE to move the credit from the clearing account to another customer.

1. From the Company menu, select Make General Journal Entries.
2. On the first line, credit the Accounts Receivable with the amount to be transferred. In the Name column, select the Customer:job you are transferring the credit to.
3. On the second line, debit the Clearing account.
4. Select Save & Close.

Finally, you can apply the credit to the unpaid invoice. Here's how:

1. From the Customers menu, select Receive Payments.
2. Choose the Customer:job you are transferring the credit to.
3. Put a check mark on the appropriate invoice, then select Discounts & Credits.
4. Go to the Credits tab and select the credit(s) you wish to apply, then select Done.

Feel free to read this article for more details on how to transfer customer credit: Transfer customer credit from one job to another in QuickBooks Desktop.

For tips and related articles in the future about the "How Do I" steps in QuickBooks Desktop, visit our QuickBooks Community help website for reference.

Reach out to me with whatever questions you may have about transferring credits or anything QuickBooks. It's my pleasure to assist you. Have a good one.