---
id: object/page/576
type: object
title: Page 576 "VAT Specification Subform"
summary: Page 576 "VAT Specification Subform" in Base Application (Microsoft.Finance.VAT.Calculation). 6 public procedures, 5 events. Present since at least BC23, still in BC30, changed in BC24-25, BC28.
tier: official
language: en
tags:
  - page
  - base application
versions:
  introduced: null
  last_changed: "28"
  deprecated: null
review:
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generated:
  at: "2026-10-11T00:31:51.816Z"
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evidence:
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    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Finance/VAT/Calculation/VATSpecificationSubform.Page.al
    title: src/Layers/W1/BaseApp/Finance/VAT/Calculation/VATSpecificationSubform.Page.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
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  localizations:
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    - localization/nz
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object_type: page
object_id: 576
name: VAT Specification Subform
caption: Lines
namespace: Microsoft.Finance.VAT.Calculation
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
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  - "29"
  - "30"
changed_in:
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  - "25"
  - "28"
source_major: "29"
obsolete: null
countries:
  - au
  - nz
ms_search_form_ids: []
counts:
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  procedures: 14
  events: 5
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  controls: 16
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relations:
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---

# Page 576 "VAT Specification Subform"

> Page 576 "VAT Specification Subform" in Base Application (Microsoft.Finance.VAT.Calculation). 6 public procedures, 5 events. Present since at least BC23, still in BC30, changed in BC24-25, BC28.

Base Application · Microsoft.Finance.VAT.Calculation · captioned "Lines" · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Finance/VAT/Calculation/VATSpecificationSubform.Page.al) · facts from BC29

## Properties

| Property | Value |
|---|---|
| Caption | Lines |
| SourceTable | VAT Amount Line |
| PageType | ListPart |

## Fields on this page

Layout controls in source order, grouped by the container they sit in. Shows: the table field a control is bound to (or its expression as written); ToolTip: the control's own, else the bound field's (marked).

| Group | Control | Shows | ToolTip |
|---|---|---|---|
| Control1 | VAT Identifier | [VAT Identifier](../table/290.md#fields) | Specifies the VAT Identifier value. <small>from the table field</small> |
|  | VAT % | [VAT %](../table/290.md#fields) | Specifies the VAT percentage that was used on the sales or purchase lines with this VAT Identifier. |
|  | VAT Calculation Type | [VAT Calculation Type](../table/290.md#fields) | Specifies how VAT will be calculated for purchases or sales of items with this particular combination of VAT business posting group and VAT product posting group. <small>from the table field</small> |
|  | Line Amount | [Line Amount](../table/290.md#fields) | Specifies the total amount for sales or purchase lines with a specific VAT identifier. <small>from the table field</small> |
|  | Inv. Disc. Base Amount | [Inv. Disc. Base Amount](../table/290.md#fields) | Specifies the invoice discount base amount. <small>from the table field</small> |
|  | Invoice Discount Amount | [Invoice Discount Amount](../table/290.md#fields) | Specifies the invoice discount amount for a specific VAT identifier. <small>from the table field</small> |
|  | VAT Base | [VAT Base](../table/290.md#fields) | Specifies the total net amount (amount excluding VAT) for sales or purchase lines with a specific VAT Identifier. <small>from the table field</small> |
|  | VAT Amount | [VAT Amount](../table/290.md#fields) | Specifies the amount of VAT that is included in the total amount. <small>from the table field</small> |
|  | Calculated VAT Amount | [Calculated VAT Amount](../table/290.md#fields) | Specifies the calculated VAT amount and is only used for reference when the user changes the VAT Amount manually. <small>from the table field</small> |
|  | VAT Difference | [VAT Difference](../table/290.md#fields) | Specifies the difference between the calculated VAT amount and a VAT amount that you have entered manually. <small>from the table field</small> |
|  | Amount Including VAT | [Amount Including VAT](../table/290.md#fields) | Specifies the net amount, including VAT, for this line. <small>from the table field</small> |
|  | NonDeductibleBase | [Non-Deductible VAT Base](../table/290.md#fields) | Specifies the amount of the transaction for which VAT is not applied due to the type of goods or services purchased. <small>from the table field</small> |
|  | CalcNonDedVATAmount | [Calc. Non-Ded. VAT Amount](../table/290.md#fields) | Specifies the calculated Non-Deductible VAT amount and is only used for reference when the user changes the Non-Deductible VAT Amount manually. <small>from the table field</small> |
|  | NonDeductibleAmount | [Non-Deductible VAT Amount](../table/290.md#fields) | Specifies the amount of VAT that is not deducted due to the type of goods or services purchased. <small>from the table field</small> |
|  | DeductibleBase | [Deductible VAT Base](../table/290.md#fields) | Specifies the amount of the transaction for which VAT is applied due to the type of goods or services purchased. <small>from the table field</small> |
|  | DeductibleAmount | [Deductible VAT Amount](../table/290.md#fields) | Specifies the amount of VAT that is deducted due to the type of goods or services purchased. <small>from the table field</small> |

## Events published

- `OnAfterSetParentControl(var ParentControl: integer)` (integration)
- `OnBeforeInitGlobals(NewCurrencyCode: Code[10]; NewAllowVATDifference: Boolean; NewAllowVATDifferenceOnThisTab: Boolean; NewPricesIncludingVAT: Boolean; NewAllowInvDisc: Boolean; NewVATBaseDiscPct: Decimal)` (integration)
- `OnBeforeCheckAmountChange(ParentControl: Integer; AmountFieldCaption: Text)` (integration)
  - subscribers: [Codeunit 6486 "Serv. VAT Specification Mgt."](../codeunit/6486.md) OnBeforeCheckAmountChange
- `OnAfterModifyRec(var SourceHeader: Variant; var VATAmountLine: Record "VAT Amount Line"; ParentControl: Integer; CurrentTabNo: Integer)` (integration)
  - subscribers: [Codeunit 6486 "Serv. VAT Specification Mgt."](../codeunit/6486.md) OnAfterModifyRec
- `OnFormCheckVATDifferenceOnAfterCalcShowVATDifferenceError(VATAmountLine: Record "VAT Amount Line"; TotalVATDifference: Decimal; Currency: Record Currency; var ShowVATDifferenceError: Boolean)` (integration)

## Procedures

- `SetTempVATAmountLine(var NewVATAmountLine: Record "VAT Amount Line")`: Sets the VAT amount line data for display in the specification subform.
- `GetTempVATAmountLine(var NewVATAmountLine: Record "VAT Amount Line")`: Retrieves the current VAT amount line data from the specification subform.
- `InitGlobals(NewCurrencyCode: Code[10]; NewAllowVATDifference: Boolean; NewAllowVATDifferenceOnThisTab: Boolean; NewPricesIncludingVAT: Boolean; NewAllowInvDisc: Boolean; NewVATBaseDiscPct: Decimal)`: Initializes global variables for VAT specification subform display and behavior control.
- `SetParentControl(ID: Integer)`: Sets the parent control identifier for the VAT specification subform.
- `SetSourceHeader(NewSourceHeader: Variant)`: Sets the source header record for VAT specification context and integration.
- `SetCurrentTabNo(TabNo: Integer)`: Sets the current tab number for context-aware VAT processing and validation.

Plus 3 local procedures.

## Triggers

OnAfterGetRecord, OnInit, OnModifyRecord

## Relations

- source table [Table 290 "VAT Amount Line"](../table/290.md)

## Calls

From the extracted call graph of BC29 (graphify-al on the snapshot checkout): calls whose target is known from a declared type or an `Object::"Name"` argument. Interface dispatch and calls through events are not counted, so the list is not complete.

- [Codeunit 6200 "Non-Deductible VAT"](../codeunit/6200.md) (1 call: `OnInit → IsNonDeductibleVATEnabled`)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC24-25, BC28

## Countries that replace it

[AU](../../localizations/au.md), [NZ](../../localizations/nz.md)

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). The call sections above are our own, per object, from the BC29 call graph. For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "page", object_name: "VAT Specification Subform")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.