Unfortunately there is no quick button to correct a closed invoice. We will add this feature in the future, but until then, follow 1 of the described below scenarios. It will depend on your decision and compliance with hotel processes. We can offer 2 options:

1. In case you just want to have it correctly balanced from the accounting point of view, you may simply post the payment and close it to invoice, so your positive invoice with all charges will be balanced to negative invoice with the payment:

• Go to the customer profile and click on the billing.
• Post the (positive) payment.
• Click "Review and Invoice".

2. Second option is much more complex, where you will correct previous invoice, re-post all the charges and close it as bill:

• Go to the customer profile and click on the billing.
• Select the revenue item(s) you are trying to correct and post a negative charge.
• Move the revenue items into the bill of the guest.
• Click "Review and Invoice".

Now, when revenue is balanced you will be able to re-post all charges to the guest bill:

• Go to the customer profile and click on the billing.
• Select the revenue item(s) you are trying to correct and post a charge.
• Move the revenue items into the bill of the guest,.
• Post the payment.
• Close the bill.