Here's how to write-off a patient balance:
1) Navigate to the patient's record and select the Transactions tab.
2) Select the purchase for which you'd like to write-off a balance using the View button.
3) Switch to the Invoices tab and select Write-off.
4) Enter the amount you'd like to write-off (the purchase's outstanding balance will populate). Click Write off to confirm and save.
The write-off will be recorded on the patient invoice: