Basic customs config

Author: mial-odoo

content/applications/finance/fiscal_localizations/mexico.rst

@@ -1527,7 +1527,7 @@ goods.
 According to the `Annex 20 <http://omawww.sat.gob.mx/tramitesyservicios/Paginas/anexo_20.htm>`_ of
 CFDI 4.0, in documents where the invoiced goods come from a first-hand import operation, the
 :guilabel:`Customs Number` field, needs to be added to all lines of products involved with the
-operation.
+operation as well as the date of the document.
 
 .. note::
    To do so, the :guilabel:`Odoo Mexico Localization for Stock/Landing` `l10n_mx_edi_landing` module
@@ -1547,23 +1547,31 @@ In order to track the correct customs number for a specific invoice, Odoo uses :
 :menuselection:`Inventory --> Configuration --> Settings`, and in the :guilabel:`Valuation` section,
 make sure that :guilabel:`Landed Costs` is activated.
 
-Begin by creating a **service-type** product called, `Pedimento`. In the :guilabel:`Purchase` tab,
-activate :guilabel:`Is a Landed Cost`, and select a :guilabel:`Default Split Method`.
+.. Tip::
+   It is recommended to add a :guilabel:`Default Jorunal` even if the customs numbers do not modify
+   the accounting directly.
 
-Then, configure the **goods-type** products that hold the customs numbers. To do so, create the
-products, and make sure the :guilabel:`Product Category` has the following configuration:
+Configure the **goods-type** products that hold the customs numbers. To do so, create the
+products and complete these three requirements:
+
+- :guilabel:`Tracking` **must** be set to either :guilabel:`By Lots` or :guilabel:`By Unique Serial 
+  Number`but **not** :guilabel:`By Quantity`.
+- :guilabel:`Invoicing Policy` **must** be set to :guilabel:`Delivered quantities`.
+- :doc:`Valuation by Lot/Serial <../../inventory_valuation/valuation_by_lots>`**must** be enabled.
+
+This will make the field :guilabel:`Customs invoicing` available on the :guilabel:`Accounting` tab,
+enable the field to use customs numbers with this product.
+
+It is important to make sure the product has a :guilabel:`Product Category` and has the following
+configuration:
 
 - :guilabel:`Costing Method`: Either :guilabel:`FIFO` or :guilabel:`AVCO`
 - :guilabel:`Inventory Valuation`: :guilabel:`Automated`
-- :guilabel:`Stock Valuation Account`: :guilabel:`115.01.01 Inventory`
-- :guilabel:`Stock Journal`: :guilabel:`Inventory Valuation`
-- :guilabel:`Stock Input Account`: :guilabel:`115.05.01 Goods in transit`
-- :guilabel:`Stock Output Account`: :guilabel:`115.05.01 Goods in transit`
 
 .. note::
-   Setting the :guilabel:`Inventory Valuation` to :guilabel:`Automated` requires first enabling the
-   feature. Go to :menuselection:`Accounting --> Configuration --> Settings`, and in the
-   :guilabel:`Stock Valuation` section, enable :guilabel:`Automatic Accounting`.
+   The feature works regardless of wheter the :doc:`Valutation 
+   <../../inventory/product_management/inventory_valuation> is set as 
+   :guilabel:`Periodic (at closing)`or :guilabel:`Perpetual (at invoicing)`.
 
 .. image:: mexico/mx-landing-configuration.png
    :alt: Storable products general configuration.