add reverse_charges content

content/via_laurea_modules/accounting/other_functionalities/reverse_charges.rst

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 Reverse Charges
 ===============
 
-data
+Reverse VAT
+-----------
+
+Introduction
+------------
+
+- Reverse VAT is a tax applied to VAT payers where the buyer, not the seller, pays the VAT to the state budget. Usually, the seller is responsible for the VAT by adding a certain tax amount to the final price.
+- This type of VAT is also applicable in cases such as:
+  1. When construction work is performed.
+  2. When improving the condition of a building or structure.
+  3. When taking over ownership of property.
+  4. When purchasing mobile phones, tablets, laptops, or other computers, hard drives, etc.
+  5. When buying wood.
+  6. When buying ferrous or non-ferrous metals.
+
+Installation and Configuration
+------------------------------
+
+- In the Odoo business management system, you need to install Account Invoice Reversed Tax Show.
+- Before using this module, you need to perform the following configurations:
+  - Create a new tax group for reverse taxes and assign them (important!).
+  - Set the reverse tax field to Force calculate the invoice.
+  - Do not use the checkbox for other types of taxes.
+
+  .. image:: reverse_charges/img1.jpg
+      :alt: Tax group configuration
+
+Daily Use Scenarios
+-------------------
+
+- When selling an item subject to reverse VAT, you need to manually change the tax.
+
+  .. image:: reverse_charges/img2.jpg
+      :alt: Manually change the tax
+
+  If configured correctly, the VAT amount is automatically calculated in the final calculation.
+
+  .. image:: reverse_charges/img3.jpg
+      :alt: Automatic VAT calculation
+
+Integrations and Connections with Other Modules
+-----------------------------------------------
+
+- The module only works with the Accounting module.