Recurring Invoice Item Add-On Charges (BL30.5)
Use Recurring Invoice Item Add-On Charges (BL30.5) to assign add-on charges to recurring invoices. The recurring invoice must already exist before you can assign an add-on charge to it. The add-on charge can be any type (flat amount, unit price, or percentage). However, the zero-after option is valid only for flat amount add-on charges.