[ADD] accounting: avatax integration

closes #1845

Signed-off-by: Antoine Vandevenne (anv) <[email protected]>

Author: StraubCreative

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

@@ -11,6 +11,7 @@ Taxes
    taxes/default_taxes
    taxes/fiscal_positions
    taxes/eu_distance_selling
+   taxes/avatax   
    taxes/taxcloud
    taxes/retention
    taxes/B2B_B2C

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

@@ -0,0 +1,74 @@
+==================
+Avatax integration
+==================
+
+Avatax is a tax calculation provider that can be integrated in Odoo.
+
+.. _avatax/credentials:
+
+Credential configuration
+========================
+
+To integrate Avatax with Odoo, go to :menuselection:`Accounting --> Configuration --> Settings -->
+Taxes` and add your Avatax credentials in the :guilabel:`Avatax` section.
+
+.. tip::
+   If you do not yet have credentials, click on :guilabel:`How to Get Credentials`.
+
+.. image:: avatax/avatax-configuration-settings.png
+   :align: center
+   :alt: Configure Avatax settings
+
+.. _avatax/tax-mapping:
+
+Tax mapping
+===========
+
+The Avatax integration is available on Sale Orders and Invoices with the included Avatax fiscal
+position.
+
+Before using the integration, specify an :guilabel:`Avatax Category` on the product categories.
+
+.. image:: avatax/avatax-category.png
+   :align: center
+   :alt: Specify Avatax Category on products
+
+Avatax Categories may be overridden or set on individual products as well.
+
+.. image:: avatax/override-avatax-product-category.png
+   :align: center
+   :alt: Override product categories as needed
+
+.. _avatax/address-mapping:
+
+Address validation
+==================
+
+Manually validate customer addresses by clicking the :guilabel:`Validate address` link in the
+customer form view.
+
+.. image:: avatax/validate-customer-address.png
+   :align: center
+   :alt: Validate customer addresses
+
+If preferred, choose to keep the newly validated address or the original address in the wizard that
+pops up.
+
+.. image:: avatax/choose-customer-address.png
+   :align: center
+   :alt: Address validation wizard
+
+.. _avatax/tax-calculation:
+
+Tax calculation
+===============
+
+Automatically calculate taxes on Odoo quotations and invoices with Avatax by confirming the
+documents. Alternatively, calculate the taxes manually by clicking the :guilabel:`Compute taxes
+using Avatax` button while these documents are in draft mode.
+
+Use the :guilabel:`Avalara Code` field that's available on customers, quotations, and invoices to
+cross-reference data in Odoo and Avatax.
+
+.. seealso::
+   - :doc:`fiscal_positions`