​@audreyS have you looked at using Advance Invoices from Customer Order? I have a video on this exact topic.

​@Marcel.Ausan 

Thanks for your video!

but I would like to know if you have had the problem of breaking down down payments to order lines, my customer uses billing milestones and he wants the down payment to be charged only to the last billing milestone.

​@audreyS I think you could create your milestones on CO Line and then in CO Header create an Advance Invoice for the same amount / % as the last milestone on CO Line. In the same CO you can have multiple Advance Invoices created, but they’re not linked to any CO Line milestone.

Normally Advance Invoices are not considered revenue. Because after an advance invoice you’ll always create the Customer Order Invoice Debit which should move the money from the advance invoice to the revenue account.

​@Marcel.Ausan 

Here's an example

my order line is for 1000 Euros
My deposit 100 Euros

1st milestone 50%
2nd milestone 50%

my customer wants the deposit to be used up on milestone 2, but IFS doesn't know how to do it, or I don't know how to set it up.
We often have this customer need that is not covered by the solution