[ADD] VAT units

content/applications/finance/accounting/taxation/taxes/vat_units.rst

@@ -0,0 +1,52 @@
+=========
+VAT units
+=========
+
+.. note::
+   This is only applicable to multi-company environments.
+
+A **VAT unit** is a group of VAT-taxable enterprises that are legally independent of each other, but
+are closely linked financially, organizationally, and economically and therefore considered one and
+the same VAT-taxable enterprise. **VAT units** are not mandatory, but if created, constituent
+companies of the unit must belong to the same **country**, use the same **currency**, and one
+company must be designated as **representative company** of the **VAT unit**.
+
+**VAT units** receive a specific **tax ID** intended only for **tax returns**. Constituent companies
+of the unit keep their own **tax ID** used for **commercial** purposes.
+
+.. example::
+   Enterprise **A** owes 300.000,00€ of VAT taxes and enterprise **B** can recover 280.000,00€ of
+   VAT taxes. They form up as a **VAT unit** so that the two amounts balance out, and must
+   conjointly only pay 20.000,00€ of VAT taxes.
+
+Configuration
+=============
+
+To configure a **VAT unit**, go to :menuselection:`Settings --> General Settings`, scroll down to
+the :guilabel:`Companies` section, and click :guilabel:`Manage Companies`. Select the company to
+serve the **representative** role, and in the :guilabel:`General Information` tab, fill in the
+mandatory fields: :guilabel:`Company Name`, :guilabel:`Address`, :guilabel:`VAT`, :guilabel:`Currency`,
+:guilabel:`Phone`, and :guilabel:`Email`.
+
+.. image:: vat_units/vat-unit-general.png
+   :align: center
+   :alt: General information tab
+
+Then, click on the :guilabel:`VAT Units` tab, :guilabel:`Add a line`, and either select an existing
+**VAT unit**, or :guilabel:`Create` a new one. Enter a **name** for the unit, :guilabel:`Country` of
+the constituent companies, the :guilabel:`Companies`, the :guilabel:`Main Company` that serves the
+**representative** role, and the :guilabel:`Tax ID` of the **VAT unit**.
+
+.. image:: vat_units/vat-unit.png
+   :align: center
+   :alt: VAT units tab
+
+Fiscal position
+---------------
+
+.. :doc:`
+
+Tax report
+==========
+
+tt