[ADD] accounting/l10n: information to use pos in Germany with TSS

task-2574610

Co-authored-by: Jacky Trinh <trj@odoo.com>
Co-authored-by: Jonathan Castillo <jcs@odoo.com>

content/applications/finance/accounting/fiscal_localizations/localizations/germany.rst

@@ -33,6 +33,134 @@ feature, the german accounting localization needs to be installed on your Odoo E
 Then you can go in :menuselection:`Accounting --> Reporting --> General Ledger` then click on the
 **Export Datev (csv)** button.
 
+.. _germany/pos:
+
+Point of Sale in Germany: Technical Security System
+===================================================
+
+The **Kassensicherungsverordnung** (The Act on Protection against Manipulation of Digital Records)
+requires that electronic record-keeping systems - including the :doc:`point of sale
+<../../../../sales/point_of_sale>` systems - must be equipped with a **Technical Security System**
+(also called **TSS** or **TSE**).
+
+Odoo offers a service that is compliant with the help of `fiskaly <https://fiskaly.com>`_, a
+*cloud-based solution*.
+
+.. important::
+   Since this solution is cloud-based, a working internet connection is required.
+
+.. note::
+   The only VAT rates allowed are given by fiskaly. You can check these rates by consulting:
+   `fiskaly DSFinV-K API: VAT Definition
+   <https://developer.fiskaly.com/api/dsfinvk/v0/#tag/VAT-Definition>`_.
+
+Configuration
+-------------
+
+Modules installation
+~~~~~~~~~~~~~~~~~~~~
+
+#. If your database was created before June 2021, :ref:`upgrade <general/upgrade>` your **Point of
+   Sale** app (`point_of_sale`) and the **Restaurant** module (`pos_restaurant`).
+#. :ref:`Install <general/install>` the **Germany - Certification for Point of Sale**
+   (`l10n_de_pos_cert`) and **Germany - Certification for Point of Sale of type restaurant**
+   (`l10n_de_pos_res_cert`) modules.
+
+   .. tip::
+      If these modules are not listed, :ref:`update the app list <general/install>`.
+
+.. image:: germany/pos-upgrade.png
+   :align: center
+   :alt: Upgrading Odoo Point of Sale from the Apps dashboard
+
+Register your company at the financial authority
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To register your company, go to :menuselection:`Settings --> General Settings --> Companies -->
+Update Info` and fill out the following fields:
+
+- **Company name**
+- Valid **address**
+- **VAT** number
+- **St.-Nr** (Steuernummer): this number is assigned by the tax office to every taxable natural or
+  legal person. (e.g., `2893081508152`)
+- **W-IdNr** (Wirtschafts-Identifikationsnummer): this number is used as a permanent
+  identification number for economically active persons.
+
+You can then **register your company through fiskaly** by opening the *fiskaly* tab and clicking on
+the *fiskaly Registration* button.
+
+.. image:: germany/fiskaly-registration.png
+   :align: center
+   :alt: Button to register a company through fiskaly in Odoo
+
+Once the registration has been finalized, new fields appear:
+
+- **fiskaly organization ID** refers to the ID of your company at the fiskaly side.
+- **fiskaly API key** and **secret** are the credentials the system uses to access the services
+  offered by fiskaly.
+
+.. image:: germany/fiskaly-keys.png
+   :align: center
+   :alt: fiskaly keys as displayed on Odoo
+
+.. note::
+   It is possible to request new credentials if there is any issue with the current ones.
+
+Create and link a Technical Security System to your PoS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. image:: germany/create-tss.png
+   :align: right
+   :alt: Create TSS option from a point of sale
+
+To use your point of sale in Germany, you first have to create a :abbr:`TSS (Technical Security
+System)` for it.
+
+To do so, go to :menuselection:`Point of Sale --> Configuration --> Point of Sale`, open the point
+of sale you want to edit, then check the box next to **Create TSS** and *Save*.
+
+.. image:: germany/tss-ids.png
+   :align: right
+   :alt: Example of TSS ID and Client ID from fiskaly in Odoo Point of Sale
+
+Once the creation of the TSS is successful, you can find your **TSS ID** and **Client ID** under the
+*fiskaly API* section.
+
+- **TSS ID** refers to the ID of your TSS at fiskaly's side.
+- **Client ID** refers to your PoS but at fiskaly's side.
+
+DSFinV-K
+--------
+
+.. image:: germany/dsfinv-k-export.png
+   :align: right
+   :alt: Menu to export DSFinV-K
+
+Whenever you close a PoS session, the orders' details are sent to the :abbr:`DSFinV-K (Digitale
+Schnittstelle der Finanzverwaltung für Kassensysteme)` service of fiskaly.
+
+In case of an audit, you can export the data sent to DSFinV-K by going to :menuselection:`Point of
+Sale --> Orders --> DSFinV-k exports`.
+
+These fields are mandatory:
+
+- **Name**
+- **Start Datetime** (export data with dates larger than or equal to the given start date)
+- **End Datetime** (export data with dates smaller than or equal to the given end date)
+
+Leave the **Point of Sale** field blank if you want to export the data of all your points of sale.
+Specify a Point of Sale if you want to export this specific PoS' data only.
+
+The creation of a DSFinV-K export triggers on export at fiskaly's side.
+
+.. image:: germany/dsfinv-k-export-fields.png
+   :align: center
+   :alt: Pending DSFinV-K export on Odoo
+
+As you can see, the **State** is *Pending*. This means that the export has been successfully
+triggered and is being processed. You have to click on *Refresh State* to check if it is ready.
+
 .. _germany/gobd:
 
 German Tax Accounting Standards: Odoo's guide to GoBD Compliance