---
title: "Maintaining GAAP Reports"
description: "When transmitting the e-balance sheet, a distinction is made between two modules: - The GCD module (Global Common Data module), which specifies which master data is transmitted, such as the entity name, legal form, etc. - The GAAP module (Generally Accepted Accounting Principles module), which represents the taxonomy for the financial data, such as accounts and items of the balance sheet, income statement, etc. In Tax Balance, you can assign and adjust the data for the GAAP module that you previously imported to the taxonomy structure in the GAAP Reports workspace."
source_url: https://support.lucanet.cloud/en/documentation/income-taxes/tax-balance/create-single-entity-tax-balance/maintain-gaap-reports
language: en
last_updated: 2026-05-28
---
# Maintaining GAAP Reports

## Overview

A distinction is made between two areas when transmitting the e-balance sheet:

- **GCD** (Global Common Data), which specifies which master data are to be transmitted, such as the name of the company, legal form etc.
- **GAAP** (Generally Accepted Accounting Principles), which represents the taxonomy for the financial data, such as accounts and items of the balance sheet, P&L, etc.

In Tax Balance, you can assign and adjust the data for the GAAP area you have [previously imported](https://support.lucanet.cloud/en/documentation/income-taxes/tax-balance/create-single-entity-tax-balance/import-data.md) to the [taxonomy structure](https://support.lucanet.cloud/en/documentation/income-taxes/tax-balance/master-data-tax-balance/create-tax-balance-sheet/notes-taxonomies.md) under **GAAP Reports**.

## Navigation

The **GAAP Reports** functional area is displayed in the tree view as soon as you open a tax balance sheet under **Company**:

'GAAP Reports' functional area

## Available GAAP Reports

### Balance Sheet

In the **Balance Sheet** workspace, you can:

- Display the values mapped to the balance sheet and P&L statement structure
- Show accounts
- Display, adjust, and add adjustments

To display only values of specific adjustment levels, you can restrict the selection of adjustment levels in the drop-down list at the top left edge:

Selection of adjustment levels

Click the row of an account or an adjustment to open the detail view and edit the details. How to proceed is described in [Accounts](#accounts) and [Adjustments](#adjustments) in the following.

### Accounts

The accounts for your GAAP reports are managed in the **Accounts** workspace:

Functions for the 'Accounts' workspace.

The following functions are available for accounts:

- Import accounts
- Display and, if necessary, adjust details for imported, manually created, and virtual accounts by clicking the account.
- Via the **More actions** menu, you can:

 - Apply existing mappings
 - Create a new grouping account
 - Delete all accounts and mappings
 - Delete all mappings

You can also create accounts and the corresponding taxonomy mapping manually. To do this, click **Add** and enter the **account number**, a **description**, and the **manual value** for the account in the displayed dialog. You can additionally assign the **taxonomy item** for the account under **Mappings**.

Editing account details

### Mappings

You can **assign taxonomy items** the imported, manually created, or virtual accounts in the **Mappings** workspace.

To do this, drag and drop the accounts on the left side to the desired taxonomy item on the right side.

With the **More actions** menu, the following functions are also available:

- **Apply** **mappings** from the previous year or any tax balance sheet. A wizard will guide you through the necessary steps.
- Create a **Mapping Report** in XLSX format that provides information on mapped and unmapped accounts as well as grouping accounts.
- **Delete** all **mappings** that have already been made.

More actions for mappings

With the three-dot menu of a taxonomy item, you can also:

- Display **detailed information** on the taxonomy item
- **Delete all mappings of the item**
- **Expand** or **collapse all subordinate items\
\
**

Three-dot menu of a taxonomy item

### Adjustments

In the **Adjustments** workspace, you can enter tax deviations based on commercial-law values at adjustment levels and create any company-specific adjustment levels required for this purpose.

For detailed instructions, see [Creating and Configuring Adjustments](https://support.lucanet.cloud/en/documentation/income-taxes/tax-balance/create-single-entity-tax-balance/maintain-gaap-reports/creating-and-configuring-adjustments.md).

### Comparison of Business Assets

You can calculate the comparison of business assets in the **Comparison of Business Assets** workspace.

To do this, open the **More actions** menu at the top right and click **Calculate**.

Calculating business asset comparison

If necessary, you can edit the calculated values manually by double-clicking the value.

{% info-box %}
The values of the comparison of business assets are calculated in accordance with the specifications of the technical guidelines of the taxonomy. At corporations, the values are calculated from the balance sheet of the current year and the balance sheet of the previous year. At partnerships, the values are calculated from the balance sheet and the capital account development of the current year.

Any values that have already been entered manually or calculated previously will be deleted. This action cannot be undone.
{% /info-box %}

### Statement of Changes in Fixed Assets

In the **Statement of Changes in Fixed Assets** workspace, all items of the statement of changes in fixed assets that have been mapped in the balance sheet and/or for which you have maintained a value are displayed. Furthermore, you can **import** a fixed asset schedule or transfer the **closing balance from the previous year** to the fixed asset schedule via the **More actions** menu:

Options for the statement of changes in fixed assets

If necessary, you can enter or edit the displayed values by clicking the desired item in the table and then selecting the item in the **Asset schedule** structure. The following dialog is displayed, where you can enter the values:

Editing values in the fixed asset schedule

{% idea-box %}
Activate the **Show item properties** option to display taxonomy-based properties in square brackets after each item, indicating whether the tax authority requires a value to be entered for that item.

The following item properties are displayed, for example:

- Mandatory field
- Mandatory sum field
- Necessary for calculation, if applicable

Item properties in the fixed asset schedule
{% /idea-box %}

### Footnotes

You can add footnotes to items in the **Footnotes** workspace.

Adding footnote

Proceed as follows:

{% stepper %}
{% stepper-step %}
In the **Footnotes** area, click **Add**.
{% /stepper-step %}
{% stepper-step %}
Enter a meaningful **title** for the footnote.
{% /stepper-step %}
{% stepper-step %}
Enter the **content** of the footnote.
{% /stepper-step %}
{% stepper-step %}
Choose the item(s) to which the footnote should be added.
{% /stepper-step %}
{% stepper-step %}
Click **Save**.

{% /stepper-step %}
{% /stepper %}
{% info-box %}
If explanations of several items are to be summarized in one footnote, we recommend transmitting this footnote to the **Tax explanatory report** item in the **Notes** section of the report.
{% /info-box %}

### KKE - Equity Accounts

You can enter the values for the development of equity accounts in the **KKE - Equity Accounts** workspace.

To do this, click the desired item in the **Account type** column and enter the values for the respective items in the displayed dialog by clicking the corresponding field.

Editing the values of an equity account

You can also **apply the closing balances from the previous year** via the **More actions** menu.

### KKE - Debt Capital Accounts

You can edit the values for the development of debt capital accounts in the **KKE - Debt Capital Accounts** workspace.

To do this, click the desired item in the **Account type** column and enter the values for the respective items in the displayed dialog by clicking the respective field.

Editing the values of a debt capital account

You can also **apply the closing balances from the previous year** via the **More actions** menu.

### Special Balance Sheets

You can add issues for individual partners and then edit the values of the issues in the **Special Balance Sheets** workspace.

You can also transfer the **closing balances from the previous year** to the special balance sheet via the **More actions** menu:

{% info-box %}
Only partners who have announced the special balance sheet in the GCD master data of the overall company and whose affiliation overlaps the balance sheet period are available for selection.
{% /info-box %}

### Supplementary Balance Sheets

You can add issues for individual partners and then edit the values of the issues in the **Supplementary Balance Sheets** workspace.

You can also transfer the **closing balances from the previous year** to the special balance sheet via the **More actions** menu:

{% info-box %}
Only shareholders who have announced the supplementary balance sheet in the GCD master data of the overall company and whose affiliation overlaps the balance sheet period are available for selection.
{% /info-box %}