[ADD] accounting: Manage fiscal years

accounting/others/adviser/fiscalyear.rst

@@ -88,3 +88,6 @@ the **Current Year Earnings**, you should set the **Lock Date** to the last day
 of the fiscal year. Making sure that before doing so, you confirm
 whether or not the current year earnings in the **Balance Sheet** is
 correctly reporting a 0 balance.
+
+.. seealso::
+  * :doc:`../configuration/fiscal_year`

accounting/others/configuration.rst

@@ -6,3 +6,4 @@ Configuration
    :titlesonly:
 
    configuration/account_type
+   configuration/fiscal_year

accounting/others/configuration/fiscal_year.rst

@@ -0,0 +1,34 @@
+===================
+Manage Fiscal Years
+===================
+
+In most cases, the fiscal years last 12 months. If it is your case, you
+just have to define what is the last day of your fiscal year in the
+accounting settings. By default, it is set on the 31st December.
+
+.. image:: media/fiscal_year01.png
+    :align: center
+
+However, there might be some exceptions. For example, if it is the first
+fiscal year of your business, it could last more or less than 12 months.
+In this case, some additional configuration is required.
+
+Go in :menuselection:`accounting --> configuration --> settings` and activate
+the fiscal years.
+
+.. image:: media/fiscal_year02.png
+    :align: center
+
+You can then configure your fiscal years in
+:menuselection:`accounting --> configuration --> fiscal years`.
+
+.. image:: media/fiscal_year03.png
+    :align: center
+
+.. note::
+    You only have to create fiscal years if they last more or less
+    than 12 months.
+
+.. seealso:: 
+
+    * :doc:`../adviser/fiscalyear`