---
id: change/bcapps/13085
type: change
title: "#13085 [Main]- Since Business Central 28.4, we have observed changed behaviour when the VAT Prod."
summary: A one-line change in the VAT Rate Change Conversion codeunit fixes a behavior change, apparently around VAT product posting groups, observed since Business Central 28.4.
tier: official
language: en
tags:
  - fix
  - main
  - bc30
  - codeunit vat rate change conversion
system: finance
review:
  state: reviewed
  by: opus
  at: "2026-10-23T01:11:44.824Z"
  flags: []
generated:
  at: "2026-11-12T00:14:43.393Z"
  pipeline: 0.2.0
  prompts:
    extract-change: 1
  input_hash: 5bddb123504d804ac903780f8a2a8bfb2918a5a1
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/pull/13085
    title: "microsoft/BCApps#13085: [Main]- Since Business Central 28.4, we have observed changed behaviour when the VAT Prod."
    date: "2026-10-22"
    commit: 5bddb123504d804ac903780f8a2a8bfb2918a5a1
    t: null
    quote: Since Business Central 28.4, we have observed changed behaviour when the VAT Prod.
links:
  learn: []
  objects:
    - object/codeunit/550
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
  changes: []
  related:
    - to: hotfix/28.5#645085
      title: Update 28.5 for Business Central
      label: relation unknown
      why: both are about VAT Product Posting Group behaviour on sales lines since 28.4; nothing says what the regression is or that one fixes the other
      by: override
    - to: https://learn.microsoft.com/dynamics365/business-central/finance-how-use-vat-rate-change-tool
      title: Manage VAT Rate Changes in Business Central
      label: possibly related
      why: Documents VAT Rate Change tool for managing VAT rate updates on master data and documents.
      by: model
number: 13085
repo: microsoft/BCApps
source_id: bcapps-prs
url: https://github.com/microsoft/BCApps/pull/13085
kind: pr
base_branch: main
major: "30"
merged_at: "2026-10-22T09:21:09Z"
author: DeepsShukla
author_type: User
community_contribution: false
labels:
  - "Team: Finance"
change_class: code
change_kind: fix
behavior_change: true
breaking: false
files:
  count: 1
  additions: 1
  deletions: 1
  al: 1
apps:
  - Base Application
objects_touched:
  - key: codeunit/550
    page: codeunit/550
    type: codeunit
    id: 550
    name: VAT Rate Change Conversion
    app: Base Application
    status: modified
objects_unjoined: []
obsoletions: []
backports: []
fixes_issues: []
work_items:
  - 654960
systems:
  - finance
quote: Since Business Central 28.4, we have observed changed behaviour when the VAT Prod.
joined_against:
  major: "30"
  commit: eb2bfe5258a473c969a6b85cdc98ce8524408706
---

# #13085 [Main]- Since Business Central 28.4, we have observed changed behaviour when the VAT Prod.

> A one-line change in the VAT Rate Change Conversion codeunit fixes a behavior change, apparently around VAT product posting groups, observed since Business Central 28.4.

[Pull request](https://github.com/microsoft/BCApps/pull/13085) · merged into `main` (BC30) on 2026-10-22 by DeepsShukla · 1 file (+1 -1), 1 AL · fix · tier official · reviewed (checked by Opus)

## What changed

- Single-line change in codeunit 550 VAT Rate Change Conversion
- Addresses bug 654960 about behavior changed since BC 28.4
- Follows up on PR 12551, which failed builds for 28.x
- Behaviour changes for users or extensions.

## AL objects touched

- [Codeunit 550 "VAT Rate Change Conversion"](../../objects/codeunit/550.md), Base Application: modified

## Context

- Work items: AB#654960
- Labels: Team: Finance
- Systems: finance
- From the description: "Since Business Central 28.4, we have observed changed behaviour when the VAT Prod."

## Possibly related

No source states these links: they share an object, a model read them, or a person found the same subject.

- [Update 28.5 for Business Central](../../hotfixes/28.5.md#645085) — relation unknown: both are about VAT Product Posting Group behaviour on sales lines since 28.4; nothing says what the regression is or that one fixes the other (checked by hand)
- [Manage VAT Rate Changes in Business Central](https://learn.microsoft.com/dynamics365/business-central/finance-how-use-vat-rate-change-tool) — possibly related: Documents VAT Rate Change tool for managing VAT rate updates on master data and documents. (model-linked)

Source: metadata of a merged pull request in microsoft/BCApps (bcapps): title, labels, changed paths and counts, with a summary in our words. No source text and no description beyond one short quote (D10, D61).