---
id: post/thedynamicsexplorer-com/9815
type: post
title: Dynamics 365 Business Central – How to change the VAT amount on a Purchase Invoice or Purchase Order
summary: Adjusting VAT amounts on purchase invoices and orders when Business Central's calculations differ from supplier invoices requires configuring the maximum allowed VAT difference and enabling the allow VAT difference option in setup pages, then editing VAT via the statistics view.
tier: community
language: en
tags:
  - vat adjustment
  - purchase invoices
  - purchase orders
  - configuration
  - vat difference
system: purchasing
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  by: opus
  at: "2026-10-08T02:00:27.979Z"
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    title: Dynamics 365 Business Central – How to change the VAT amount on a Purchase Invoice or Purchase Order
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    title: Dynamics 365 Business Central – How to change the VAT amount on a Purchase Invoice or Purchase Order
    date: "2025-07-21"
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    quote: We first do this by setting the Max. VAT Difference Allowed in the General Ledger Setup.
  - kind: blog
    url: https://thedynamicsexplorer.com/2025/07/21/dynamics-365-business-central-how-to-change-the-vat-amount-on-a-purchase-invoice-or-purchase-order/
    title: Dynamics 365 Business Central – How to change the VAT amount on a Purchase Invoice or Purchase Order
    date: "2025-07-21"
    commit: null
    t: null
    quote: Next I need to switch the Allow VAT Difference option ON in the Purchase & Payables Setup page.
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post_id: "9815"
source_id: thedynamicsexplorer-com
source_name: The Dynamics Explorer
url: https://thedynamicsexplorer.com/2025/07/21/dynamics-365-business-central-how-to-change-the-vat-amount-on-a-purchase-invoice-or-purchase-order/
published_at: "2025-07-21T11:00:00.000Z"
author: Gavin Whittaker
full_text: false
words: 416
quotes:
  - text: We first do this by setting the Max. VAT Difference Allowed in the General Ledger Setup.
    why_it_matters: Identifies the first required configuration step to enable VAT adjustments
  - text: Next I need to switch the Allow VAT Difference option ON in the Purchase & Payables Setup page.
    why_it_matters: Describes the second configuration step needed to allow VAT editing on purchase transactions
code_objects_mentioned:
  - page Purchase Invoice
  - page Purchase Order
systems:
  - purchasing
  - finance
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# Dynamics 365 Business Central – How to change the VAT amount on a Purchase Invoice or Purchase Order

[Read the post](https://thedynamicsexplorer.com/2025/07/21/dynamics-365-business-central-how-to-change-the-vat-amount-on-a-purchase-invoice-or-purchase-order/) · The Dynamics Explorer (Gavin Whittaker) · 2025-07-21 · 416 words · tier community · reviewed (checked by Opus)

> Adjusting VAT amounts on purchase invoices and orders when Business Central's calculations differ from supplier invoices requires configuring the maximum allowed VAT difference and enabling the allow VAT difference option in setup pages, then editing VAT via the statistics view.

## Key points

- Set Max. VAT Difference Allowed in General Ledger Setup to define how much the VAT may be changed
- Turn on Allow VAT Difference in Purchase & Payables Setup so VAT can be edited on purchase transactions
- On the Purchase Invoice page, open Invoice > Statistics and edit the VAT Amount
- On the Purchase Order page, open Order > Statistics, then drill down on No. of VAT Lines in the Invoicing FastTab to edit the VAT
- The aim is to match the VAT shown on the supplier's invoice

## Quotes

- "We first do this by setting the Max. VAT Difference Allowed in the General Ledger Setup." (Identifies the first required configuration step to enable VAT adjustments)
- "Next I need to switch the Allow VAT Difference option ON in the Purchase & Payables Setup page." (Describes the second configuration step needed to allow VAT editing on purchase transactions)

## AL objects mentioned

As named in the post. A name that matches one object page by exact type and name links to it; the others stay as named.

- [page 51 "Purchase Invoice"](../../objects/page/51.md)
- [page 50 "Purchase Order"](../../objects/page/50.md)

## Context

- Features: VAT amount adjustment, VAT difference allowance, maximum VAT difference configuration, purchase document editing

Source: The Dynamics Explorer, community blog. Summary, key points and quotes are derived (CONTENT-NOTICE.md); read the original for the full text.