An Invoice can be Voided if it has been deemed invalid. Voiding is used when the A/R is no longer considered valid. You might need to void an Invoice if, for example, a customer received a damaged purchase or wants to return and refund an item they purchased.
To Void an Invoice, click the Void action from the Sales Order record page. The page will refresh.
You will notice the following changes:
The Status is now Voided
The Balance Due field is reduced to zero (0.00)
The Is Voided checkbox field is now checked.
New Adjustment Lines have been added to your Sales Order Lines related list negating the price of the Invoice.
New Transaction Lines are available in the Transaction related list for your voided Sales Order Lines.