For Billing or Service Management invoices, verify your void settings in File, Company Settings, AR Settings, Entry Settings.
You can only void invoices after you've voided or unapplied all cash receipts, retainage billed, and adjustments. See the Related Solutions for information on these processes.
Void the invoice
Go to Tasks, Adjust Receivables.
Enter the Customer.
Enter the Accounting Date for the transaction.
NOTE:
When unapplying or voiding cash receipts or adjustments, you can give each step its own date. Change the date between entries.
In the View, select All activity.
Find the invoice.
If the invoice has cash receipts applied, select the cash receipt, and click Unapply
If the invoice has adjustments applied, select the adjustment, and click Void
After you remove all cash receipts and adjustments from the invoice, select the invoice. Click Void.
If the invoice is from Billing or Service Management and needs adjustment, check the Reinstate Invoice box.