Unable to Apply Prepayment (Percentage or Fixed Amount) at Document Level in Purchase Orders

This would be super helpful!  Another use case we’re running across - the vendor does progress billing with these percentages: 30/30/30/10

First prepayment is easy, I can enter that it should be 30% prepayment, but the 2nd prepayment, if I pick 30%, it assumes I want to prepay 30% of the remaining PO balance - when I really need 30% of the full PO value.

These PO’s can have 20+ line items - which is also cumbersome to do the math and add the prepayment amount at the line level - I would like the option to do this at the header level either as a percentage of the full PO value, or a flat dollar amount. Then if needed, can modify percentage or amount at the line level.

You’re not the only one(s) with issues here - The system for prepayments against PO’s works entirely different from how a sales order works (I even have vendors on Acumatica and we can’t keep things straight because of the differences between their SO prepayments and my PO prepayment application) 

This should be far easier and much more flexible given the numerous ways businesses might arrange deposits and terms.  Please take a look at this thread and vote! 

This is what our AP Payments screen should look like - Allocate as you like!