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Business Central API adjust VAT on Sales Invoice

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Posted on by ChrisOnboard365

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Hi

I'm looking for some assistance with the Business Central API. Currently I'm making calls to BC using the api v2.0 https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/api-reference/v2.0/ which is working well so far.

I'm generating Sales Invoices from data exported from a till system, and very occasionally there is a VAT rounding difference.

I've searched but I can't find any way to adjust the VAT amount via the API.

Does anyone know if this is possible to do via the API?

Many thanks

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IB-29041624-0 1,191 Moderator on at

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Hi,

You can not adjust the VAT amount when you create sales invoices via the API, You can only change the VAT posting group that is used.

If you posted your sales through a journal you have some more control over the VAT amounts because you would be able to manipulate the VAT base amounts.

You should try to figure out why the differences occur and fix the root cause. Maybe you need to round your prices before you create the sales invoice?

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

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Hi, In BC you can only adjust Vat Amount by the following method.

https://yzhums.com/2056/

Of course this can be achieved in Code, but it is very complicated.

If you really want to do it, instead of directly modifying the fields on the page, you can use the following method to bind a new actionto update the VAT.

https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-creating-and-interacting-with-odatav4-bound-action

Hope this will help.

Thanks.

ZHU

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