Sometimes you may need to make changes to items that are assigned to Paid invoices, in order to do this you will need to first of all remove the payment from the invoices.

To remove the payment from a standalone invoice you will have to go to the Invoices section -> View the invoice in question -> go to Cost Items & Payments -> click the Payments button and remove the payment. Then, after making the necessary changes, you can add the payment to the invoice again.

To remove the payment from a standalone invoice you will have to go to the Invoices section -> View the invoice in question -> click the Payments button and remove the payment. Then, after making the necessary changes, you can add the payment to the invoice again.