AL tax payments

Good afternoon - looking for some information regarding paying the state of Alabama withholding taxes via ACH with AP161. According to our users, they have to go to the AL website, and file a report prior to sending the dollars. When the report is filed, they receive a confirmation number, and they have to re-enter this when paying the tax via ACH? Doesn't make a lot of sense to me.... So, if you use standard Lawson/Infor AP and pay AL state withholding via AP161, would you share your process? I'm assuming the confirmation number is different every month? Many thanks!!