[IMP] accounting: direct customers to official fork of Taxcloud modules

Also improve wording a bit.

X-original-commit: 968177ade5
Co-authored-by: Renee Carano <rca@odoo.com>
Co-authored-by: Zachary Straub <zst@odoo.com>

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

@@ -3,9 +3,12 @@ TaxCloud integration
 ====================
 
 .. warning::
-   The Odoo TaxCloud integration has begun its decommissioning, starting in Odoo 17. New
-   installations are prohibited in Odoo 17, and in Odoo 18, the TaxCloud module(s) won't exist at
-   all. Odoo recommends the use of the Avatax platform.
+   The out-of-the-box Odoo TaxCloud integration has begun its decommissioning. Starting in Odoo 17,
+   new installations are prohibited, and in Odoo 18 the TaxCloud module(s) won't exist at all. Odoo
+   recommends the use of the Avatax platform.
+
+   If you are hosted on-premise or on Odoo.SH and you wish to use Taxcloud, you can contact them
+   directly `here <https://taxcloud.com/blog/odoo-integration/>`_.
 
 .. seealso::
    :doc:`avatax`