All this can be done in the Debts screen.
1. Go to Debts.
2. This will list all the jobs that currently have a balance outstanding.
Find a specific job - Enter the job address / customer name in the search bar at the top of the screen and wait for the results to filter.
Pay a debt
1. Find the job you want to pay
2. Click on the Pay button.
3. Enter the Amount you wish to pay off (defaulted to the amount owed).
4. Enter the Payment Method.
5. Click on Submit.
This will post a payment to the transactions. You can view this transaction by clicking on the job and selecting the Financial Information tab.