Click on the Link "Periodic Invoicing List".
Click on the Button "Create new billing month".
The First Month January 2023 is created. Click on the Link 2023.
Click on the Button "Create Invoice(s). All periodic invoices for this month are created from the active contracts,
Click on the Button "Yes".
Click on the Button "Post Invoice(s)". All invoices will be posted. Then click on the "Back Button"
Click on the Link "Posted Sales Invoices".
Then Click on the Link from the Invoice Number.
Click on the "Print" Button.
The click on the "Preview" Button.
This is your monthly Invoice for your customer. The invoice is generated every month according to the duration of the contract.