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Small and medium business | Business Central, N...
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Negative amounts on prepayments

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Dead Community, 

We are a manufacturing company that sells vehicles.
Currently the Italian authorities gives out a "ECOBONUS" for some vehicles with a low carbon footprint.

In order to claim this ECOBONUS from Italian authorities we need to state on the customer invoice that we've deducted the ecobonus amount.


The issue follows:
We use the prepayment functionality for all sales in Italy and we can't add a negative sales line for the ecobonus amount that's deducted for the whole sales order.

Is it safe to customize away the "Prepayment lines cannot be negative" error message or are there any risks with doing it?
Is there another way we can handle it?

The ecobonus is not a discount but rather an amount that should be deducted from the total invoice amount.

Many thanks! / Daniel

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  • Suggested answer
    Jun Wang Profile Picture
    8,200 Super User 2025 Season 2 on at
    RE: Negative amounts on prepayments

    you could consider create an item charge, then put in a negative amount. Assign it to the item line and total invoice will be deducted. below is an example using sales allowance. But you can create a new one like ecobonus etc.

    pastedimage1684330485820v1.png

  • Suggested answer
    Nitin Verma Profile Picture
    21,698 Moderator on at
    RE: Negative amounts on prepayments

    Adding more info. Yes you can raise some event if system or user tries to enter any amount in negative.

    Thanks.

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