You want to transfer a customer credit from one job to another job, and use that credit to pay for an invoice on the second job.
Quick Tip: To transfer a credit amount from one job to another, you need to create two General Journal Entries. The first entry transfers the amount from the existing job to a clearing account and the second entry transfers the amount from the clearing account to the new job.
If you do not have one yet, click here for instructions on setting up a clearing account. You may need to consult an accounting professional if you require assistance determining which account to use.