Context
Deleting or modifying an invoice is illegal! Nevertheless, there are solutions to correct an invoice.
1/ Cancellation
Consists in cancelling the “erroneous” invoice, provided that an invoice containing the “negative” of this invoice is also issued.
To learn more visit: How to cancel an invoice?
Attention! This action is only possible if the invoice is in “Payment Due”. If a payment has already taken place then you can no longer cancel it.
2/ The refund
If the invoice has already been honoured, you still have the option to refund it.
To learn more, visit: How to refund an invoice ?
3/ Adding a line of credit.
Finally, if you do not want to reimburse the entire bill or for some other reason, you want to make a commercial gesture that will apply to future bills. You can add a line of credit to the customer’s balance.
To learn more visit: How to add a line of credit/debit in the customer’s balance ?