Cannot void an invoice - either button is grayed out on the Invoice form or the invoice# is not displayed in the dialog box when Voiding from the Void Invoice option from Invoice Menu.
Could be a variety of things:
Check the Company information in Admin Settings to see if they allow exported invoices to be void.
Can only void the last invoice on a job unless it is a sales or DTC invoice. This is because the time sequence is important on rental invoices.
DTC tickets must be invoiced from the ticket or using the Invoice only DTC Tickets on the invoice prompt in order for them to be flagged as 'Sale' and allow for voiding.