Web Dashboard: How to Edit a Payment STEP 1: Login to InvoiceASAP at https://invoiceasap.com > Log In STEP 2: Click on Invoices on the left navigation. STEP 3: Click on the payment icon next to the invoice whose payment you want to edit. STEP 4: Click on the payment you want to edit. STEP 5: Make the change, then Save. In this example, we are changing the Reference Number. The change has been saved. Have more questions? Submit a request 0 Comments Please sign in to leave a comment.