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Invoice discount and Line Discount get updated unexpectedly

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Posted on by HarukaMatsumoto

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Hi Team

I see an unexpected behavior on SO when both Line discount and Invoice discount are applied. If Line Discount or Invoice Discount is updated, then the other one get automatically updated like the below example. This behavior sometimes happens but sometimes does not. What is the logic behind this?

i.e.

1) Change the Line Discount% to 60

2) Update the Invoice Discont % from 44.218 to 50

3) The Line Discount% is automatically updated to 15 from 60

I see this in a standard environment w/o customization. My client want to enter Line discount and "Header" discount but I am not sure if I can suggest Invoice discount due to this unexpected behavior...

Please advise!

Thanks,

Haruka

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Dynamics 365 Business Central

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Dallefeld 235 User Group Leader on at

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Just from looking at the screenshots, it seems something else is going on. Why did the invoice discount only affect the second line on the sales order and why did the total excl tax and total incl tax go up $5.

You might want to look at item setups where some items have allow invoice discount and others do not. If you set them all to do not allow, does that help your scenario?

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YUN ZHU 102,763 Super User 2026 Season 2 on at

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Hi, I tested it in my standard environment and it seems to be fine.

Line Discount:

Invoice Discount

And as Kim said, this data looks a bit wired, please try again after clearing Line Discount %, Inv. Discount Amount Excl. VAT, and Invoice Discount % values.

Hope this helps.

Thanks.

ZHU

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HarukaMatsumoto 126 on at

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Thank you Kim and Yun for your advices.

I found that this is caused if 2) is performed right after 1) without moving cursor out. If I click other row after 1), the change is saved and 2) action does not affect to the line discount.

I could not see this issue in the NAV Windows client but in the NAV web client. It seems by the saving timing of web UI.

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