[ADD] accounting/l10n: add section about E-waybill (India)

closes odoo/documentation#3333

Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

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

@@ -19,16 +19,19 @@ localization:
    * - :guilabel:`Indian - Accounting`
      - `l10n_in`
      - Default :doc:`fiscal localization package <../overview/fiscal_localization_packages>`
-   * - :guilabel:`Indian E-invoice Integration`
+   * - :guilabel:`Indian E-invoicing`
      - `l10n_in_edi`
      - :ref:`Indian e-invoicing integration <india/e-invoicing>`
+   * - :guilabel:`Indian E-waybill`
+     - `l10n_in_edi_ewaybill`
+     - :ref:`Indian E-waybill integration <india/e-waybill>`
 
 .. _india/e-invoicing:
 
 Indian e-invoicing
 ==================
 
-Odoo is compliant with the **Indian Good and Services Tax (GST) e-Invoice system** requirements.
+Odoo is compliant with the **Indian Goods and Services Tax (GST) e-Invoice system** requirements.
 
 .. important::
    Indian e-invoicing is available from Odoo 15.0. If needed, :doc:`upgrade
@@ -42,7 +45,7 @@ Registration on your NIC e-Invoice web portal
 You must register on the **NIC e-Invoice** web portal to get your **API credentials**. You need
 these credentials to :ref:`configure your Odoo Accounting app <india/e-invoicing-configuration>`.
 
-#. Login to the NIC e-Invoice web portal on - https://einvoice1.gst.gov.in/ by clicking on
+#. Log in to the NIC e-Invoice web portal at https://einvoice1.gst.gov.in/ by clicking on
    :guilabel:`Login` and entering your :guilabel:`Username` and :guilabel:`Password`.
 
    .. note::
@@ -65,7 +68,7 @@ these credentials to :ref:`configure your Odoo Accounting app <india/e-invoicing
 
    .. image:: india/trigger-otp.png
       :align: center
-      :alt: Trigger an OTP to your registerd phone number
+      :alt: Trigger an OTP to your registered phone number
 
 #. Select :guilabel:`Through GSP` in the first field, select :guilabel:`Tera Software Limited`
    as your GSP, and type in a :guilabel:`Username` and :guilabel:`Password` for your API.
@@ -153,17 +156,20 @@ the :guilabel:`Cancel reason` and :guilabel:`Cancel remarks` fields. Then, click
 :guilabel:`Request EDI cancellation`. The status of the :guilabel:`Electronic invoicing` field
 changes to :guilabel:`To Cancel`.
 
+.. important::
+   Doing so cancels both the :ref:`E-invoice <india/e-invoicing>` and the :ref:`E-waybill
+   <india/e-waybill>`.
+
 .. image:: india/e-invoice-cancellation.png
    :align: center
    :alt: cancel reason and remarks
 
 .. note::
-   If you want to abort the cancellation before processing the invoice, then click on
-   :guilabel:`Call Off EDI Cancellation`.
-
-Once you request to cancel the e-invoice, Odoo automatically submits the JSON Signed file to the
-government portal. If you want to process the invoice immediately, you can process it by clicking on
-:guilabel:`Process Now`.
+   - If you want to abort the cancellation before processing the invoice, then click on
+     :guilabel:`Call Off EDI Cancellation`.
+   - Once you request to cancel the e-invoice, Odoo automatically submits the JSON Signed file to
+     the government portal. You can click on :guilabel:`Process Now` if you want to process the
+     invoice immediately.
 
 .. _india/verify-e-invoice:
 
@@ -187,3 +193,146 @@ website.
    .. image:: india/signed-invoice.png
       :align: center
       :alt: verified e-invoice
+
+.. _india/e-waybill:
+
+Indian E-waybill
+================
+
+Odoo is compliant with the **Indian Goods and Services Tax (GST) E-waybill system** requirements.
+
+.. important::
+   Indian E-waybill is available from Odoo 15.0. If needed, :doc:`upgrade </administration/upgrade>`
+   your database.
+
+.. _india/e-waybill-api:
+
+API Registration on your NIC E-waybill web portal
+--------------------------------------------------
+
+You must register on the **NIC E-waybill** web portal to create your **API credentials**. You need
+these credentials to :ref:`configure your Odoo Accounting app <india/e-waybill-configuration>`.
+
+#. Log in to the NIC E-waybill web portal at https://ewaybillgst.gov.in/ by clicking on
+   :guilabel:`Login` and entering your :guilabel:`Username` and :guilabel:`Password`.
+
+   .. image:: india/e-waybill-system-login.png
+      :align: center
+      :alt: E-waybill login
+
+#. From your dashboard, go to :menuselection:`Registration --> For GSP`.
+
+   .. image:: india/e-waybill-registration-menu.png
+      :align: center
+      :alt: E-waybill registration
+
+#. Click on :guilabel:`Send OTP`; you should receive an :abbr:`OTP (one-time password)` code to your
+   registered mobile number.
+#. Enter the OTP code and click on :guilabel:`Verify OTP`.
+
+   .. image:: india/e-waybill-gsp-registration.png
+      :align: center
+      :alt: E-waybill OTP verification
+
+#. Check if :guilabel:`Tera Software Limited` is already on the list of registered GSP/ERP. If so,
+   use this username and password. Otherwise, follow the next steps.
+
+   .. image:: india/e-waybill-gsp-list.png
+      :align: center
+      :alt: E-waybill list of registered GSP/ERP
+
+#. Select :guilabel:`Add/New`, select :guilabel:`Tera Software Limited` as your GSP Name, create a
+   :guilabel:`Username` and a :guilabel:`Password` for your API, and click on :guilabel:`Add`.
+
+   .. image:: india/e-waybill-registration-details.png
+      :align: center
+      :alt: Submit GSP API registration details
+
+.. _india/e-waybill-configuration:
+
+Configuration on Odoo
+---------------------
+
+To set up the E-waybill service, go to :menuselection:`Accounting --> Configuration --> Settings -->
+Indian Electronic WayBill --> Setup E-Waybill`, and enter your :guilabel:`Username` and
+:guilabel:`Password`.
+
+.. image:: india/e-waybill-configuration.png
+   :align: center
+   :alt: E-waybill setup odoo
+
+.. _india/e-waybill-workflow:
+
+Workflow
+--------
+
+To issue an E-waybill from Odoo, you must create an invoice/bill with the details of the E-waybill
+using the standard invoicing/bill flow (either from a sales/purchase order or the invoice/bill menu
+in Accounting).
+
+.. _india/e-waybill-send:
+
+Send an E-waybill
+~~~~~~~~~~~~~~~~~
+
+You can manually send an E-waybill by clicking on :guilabel:`Send E-waybill`.
+
+.. image:: india/e-waybill-send-button.png
+   :align: center
+   :alt: Send E-waybill button on invoices
+
+To send the E-waybill automatically when you confirm an invoice or a bill, enable
+:guilabel:`E-waybill (IN)` in your :ref:`Sale/Purchase Journal <india/e-invoicing-journals>`.
+
+.. _india/invoice-validation-e-way:
+
+Invoice validation
+~~~~~~~~~~~~~~~~~~
+
+Once you have issued the invoice and clicked on :guilabel:`Send E-waybill`, a confirmation message
+is displayed.
+
+.. note::
+   - Odoo automatically uploads the JSON-signed file to the government portal after a while. You can
+     click on :guilabel:`Process Now` if you want to process the invoice immediately.
+   - You can find the JSON-signed file in the attached files in the chatter.
+
+.. image:: india/e-waybill-process.png
+   :align: center
+   :alt: Indian e-waybill confirmation message: "The invoice will be processed asynchronously by
+         the following E-waybill service : E-waybill (IN)"
+
+Invoice PDF Report
+~~~~~~~~~~~~~~~~~~
+
+You can print the invoice PDF report once you have submitted the E-waybill. The report includes the
+**E-waybill number** and the **E-waybill validity date**.
+
+.. image:: india/e-waybill-invoice-report.png
+   :align: center
+   :alt: E-waybill acknowledgment number and date
+
+.. _india/e-waybill-cancellation:
+
+E-waybill Cancellation
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you want to cancel an E-waybill, go to the :guilabel:`eWayBill` tab of the invoice and fill out
+the :guilabel:`Cancel reason` and :guilabel:`Cancel remarks` fields. Then, click on
+:guilabel:`Request EDI Cancellation`.
+
+.. important::
+   Doing so cancels both the :ref:`E-invoice <india/e-invoicing>` and the :ref:`E-waybill
+   <india/e-waybill>`.
+
+.. image:: india/e-waybill-cancellation.png
+   :align: center
+   :alt: cancel reason and remarks
+
+.. note::
+   - If you want to abort the cancellation before processing the invoice, click on :guilabel:`Call
+     Off EDI Cancellation`.
+   - If the E-invoice is applicable for this invoice, then it will also be canceled.
+   - Once you request to cancel the E-waybill, Odoo automatically submits the JSON Signed file to
+     the government portal. You can click on :guilabel:`Process Now` if you want to process the
+     invoice immediately.