---
id: object/codeunit/799
type: object
title: Codeunit 799 "VAT Reporting Date Mgt"
summary: Codeunit 799 "VAT Reporting Date Mgt" in Base Application (Microsoft.Finance.VAT.Calculation). 14 public procedures, 6 events, 3 event subscribers. Present since at least BC23, still in BC30, changed in BC24-28.
tier: official
language: en
tags:
  - codeunit
  - base application
versions:
  introduced: null
  last_changed: "28"
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: 93a5d9a3020cef7a5fa35c25e780a0f42d345a72829754cbb801b7355a3347a0
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Finance/VAT/Calculation/VATReportingDateMgt.Codeunit.al
    title: src/Layers/W1/BaseApp/Finance/VAT/Calculation/VATReportingDateMgt.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects: []
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
  changes:
    - change/bcapps/9485
object_type: codeunit
object_id: 799
name: VAT Reporting Date Mgt
namespace: Microsoft.Finance.VAT.Calculation
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in:
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 34
  events: 6
  subscribers: 3
relations:
  out: 0
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 2
  calls: 4
  called_by: 36
  implements: 0
---

# Codeunit 799 "VAT Reporting Date Mgt"

> Codeunit 799 "VAT Reporting Date Mgt" in Base Application (Microsoft.Finance.VAT.Calculation). 14 public procedures, 6 events, 3 event subscribers. Present since at least BC23, still in BC30, changed in BC24-28.

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

## Properties

| Property | Value |
|---|---|
| SingleInstance | true |
| Permissions | TableData "Issued Reminder Header" = rm, TableData "Issued Fin. Charge Memo Header" = rm, TableData "Purch. Inv. Header" = rm, TableData "Purch. Cr. Memo Hdr." = rm, tabledata "Sales Invoice Header" = rm, tabledata "Sales Cr.Memo Header" = rm, TableData "G/L Entry" = rm, TableData "VAT Entry" = rm, ... |

## Events published

- `OnBeforeIsVATDateModifiable(var IsModifiable: Boolean; var IsHandled: Boolean)` (integration): Integration event raised before determining if VAT reporting dates are modifiable. Enables custom logic to control VAT date modification permissions.
- `OnBeforeIsVATDateEnabledForUse(var IsEnabled: Boolean; var IsHandled: Boolean)` (integration): Integration event raised before determining if VAT reporting date feature is enabled. Enables custom logic to control VAT date feature availability.
- `OnBeforeUpdateLinkedEntries(VATEntry: Record "VAT Entry"; var IsHandled: Boolean)` (integration): Integration event raised before updating linked entries for VAT date changes. Enables custom processing or replacement of standard linked entry updates.
- `OnAfterUpdateLinkedEntries(VATEntry: Record "VAT Entry")` (integration): Integration event raised after updating linked entries for VAT date changes. Enables custom post-processing after standard linked entry updates are completed.
- `OnUpdatePostedDocumentsOnAfterUpdateSalesInvoice(VATEntry: Record "VAT Entry"; var Updated: Boolean)` (integration): Integration event raised after updating sales invoice header during linked entry processing. Enables custom actions after VAT date updates in posted sales invoices.
  - subscribers: [Codeunit 6470 "Serv. VAT Reporting Mgt."](../codeunit/6470.md) OnUpdatePostedDocumentsOnAfterUpdateSalesInvoice
- `OnUpdatePostedDocumentsOnAfterUpdateSalesCreditMemo(VATEntry: Record "VAT Entry"; var Updated: Boolean)` (integration): Integration event raised after updating sales credit memo header during linked entry processing. Enables custom actions after VAT date updates in posted sales credit memos.
  - subscribers: [Codeunit 6470 "Serv. VAT Reporting Mgt."](../codeunit/6470.md) OnUpdatePostedDocumentsOnAfterUpdateSalesCreditMemo

## Event subscriptions

- ResetVATReturnPeriodWarningOnBeforeGenJnlPostLineCode subscribes to Codeunit "Gen. Jnl.-Post Line" OnBeforeCode
- ResetVATReturnPeriodWarningOnAfterFinishPosting subscribes to Codeunit "Gen. Jnl.-Post Line" OnAfterFinishPosting
- OnAfterModifyEventCheckVATReportingDate subscribes to Table "General Ledger Setup" OnAfterModifyEvent

## Procedures

- `UpdateLinkedEntries(VATEntry: Record "VAT Entry")`: Updates linked entries when VAT entry VAT reporting date is modified. Synchronizes VAT date changes across related general ledger and document entries.
- `IsVATDateModifiable(): Boolean`: Determines whether VAT reporting dates can be modified based on system configuration and permissions.
- `IsVATDateUsageSetToPostingDate(): Boolean`: Checks whether VAT reporting date usage is configured to use posting date as default.
- `IsVATDateUsageSetToDocumentDate(): Boolean`: Checks whether VAT reporting date usage is configured to use document date as default.
- `IsVATDateEnabled(): Boolean`: Determines whether VAT reporting date functionality is enabled in the system.
- `IsValidDate(Variant: Variant; VATDateFieldNo: Integer): Boolean` (internal)
- `IsValidDate(Variant: Variant; VATDateFieldNo: Integer; ThrowError: Boolean): Boolean`: Validates VAT reporting date against configured VAT periods and date restrictions.
- `IsValidVATDate(VATEntry: Record "VAT Entry"): Boolean`: Validates VAT reporting date in the specified VAT entry against period restrictions.
- `IsValidDate(VATDate: Date): Boolean`: Validates specified VAT date against configured VAT period restrictions and date ranges.
- `CheckDateAllowed(VATDate: Date; ContextFieldNo: Integer)`: Validates and enforces VAT date restrictions, throwing errors for invalid dates.
- `CheckDateAllowed(VATDate: Date; ContextFieldNo: Integer; ExistingEntry: Boolean)` (internal)
- `CheckDateAllowed(VATDate: Date; ContextFieldNo: Integer; ExistingEntry: Boolean; CheckInAllowPeriod: Boolean)` (internal)
- `CheckVATDateValidInVATReturnPeriod(VATDate: Date; ContextFieldNo: Integer; ExistingEntry: Boolean)` (internal)
- `ResetVATReturnPeriodWarning()`

Plus 11 local procedures.

## Triggers

OnRun

## 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 1431 "Forward Link Mgt."](../codeunit/1431.md) (1 call: `CheckVATDateValidInVATReturnPeriod → GetHelpCodeForAllowedVATDate`)
- [Codeunit 27 "Confirm Management"](../codeunit/27.md) (1 call: `GetVATReturnPeriodWarningResponse → GetResponseOrDefault`)
- [Codeunit 28 "Error Message Management"](../codeunit/28.md) (1 call: `CheckVATDateValidInVATReturnPeriod → LogContextFieldError`)
- [Codeunit 8703 "Feature Telemetry"](../codeunit/8703.md) (1 call: `UpdateLinkedEntries → LogUsage`)

## Called by

- [Page 315 "VAT Entries"](../page/315.md) (2 calls: `OnOpenPage → IsVATDateEnabled`, `OnOpenPage → IsVATDateModifiable`)
- [Codeunit 11 "Gen. Jnl.-Check Line"](../codeunit/11.md) (1 call: `CheckVATDate → IsValidDate`)
- [Codeunit 5700 "User Setup Management"](../codeunit/5700.md) (1 call: `IsVATDateInAllowedPeriod → IsVATDateEnabled`)
- [Page 119 "User Setup"](../page/119.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 132 "Posted Sales Invoice"](../page/132.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 134 "Posted Sales Credit Memo"](../page/134.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 138 "Posted Purchase Invoice"](../page/138.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 140 "Posted Purchase Credit Memo"](../page/140.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 187 "VAT Setup"](../page/187.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 20 "General Ledger Entries"](../page/20.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 253 "Sales Journal"](../page/253.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 254 "Purchase Journal"](../page/254.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 283 "Recurring General Journal"](../page/283.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 39 "General Journal"](../page/39.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 42 "Sales Order"](../page/42.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 43 "Sales Invoice"](../page/43.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 434 "Reminder"](../page/434.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 438 "Issued Reminder"](../page/438.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 44 "Sales Credit Memo"](../page/44.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 446 "Finance Charge Memo"](../page/446.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 450 "Issued Finance Charge Memo"](../page/450.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 50 "Purchase Order"](../page/50.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 51 "Purchase Invoice"](../page/51.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 5159 "Sales Order Archive"](../page/5159.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 5167 "Purchase Order Archive"](../page/5167.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 52 "Purchase Credit Memo"](../page/52.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 5900 "Service Order"](../page/5900.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 5933 "Service Invoice"](../page/5933.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 5935 "Service Credit Memo"](../page/5935.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 5972 "Posted Service Credit Memo"](../page/5972.md) (1 call: `ActivateFields → IsVATDateEnabled`)
- [Page 5978 "Posted Service Invoice"](../page/5978.md) (1 call: `ActivateFields → IsVATDateEnabled`)
- [Page 6271 "Service Order Archive"](../page/6271.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 6630 "Sales Return Order"](../page/6630.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 6640 "Purchase Return Order"](../page/6640.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Page 6761 "Issue Reminders Setup"](../page/6761.md) (1 call: `OnOpenPage → IsVATDateEnabled`)
- [Report 20 "Calc. and Post VAT Settlement"](../report/20.md) (1 call: `OnInitReport → IsVATDateEnabled`)

## Recent changes

- 2026-07-17 [#9485 [main]-Multiple error messages when posting to period with VAT Return already in status Released](../../changes/bcapps/9485.md) (main, BC30, fix)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC24-28

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: "codeunit", object_name: "VAT Reporting Date Mgt")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.