diff --git a/intrastat_product/README.rst b/intrastat_product/README.rst
index 9d61b10..494c08c 100644
--- a/intrastat_product/README.rst
+++ b/intrastat_product/README.rst
@@ -102,6 +102,13 @@ and adapt the code for the specific needs of your country.
 
   Cf. l10n_be_istrastat_product as example, replace "be" by your Country Code.
 
+Known issues / Roadmap
+======================
+
+The declaration is based upon the invoices of the corresponding tax declaration period.
+
+An option to generate the intrastat declaration based upon the dates of the physical movements of goods is currently not available.
+
 Bug Tracker
 ===========
 
diff --git a/intrastat_product/static/description/index.html b/intrastat_product/static/description/index.html
index 7a63185..eaa3320 100644
--- a/intrastat_product/static/description/index.html
+++ b/intrastat_product/static/description/index.html
@@ -384,11 +384,12 @@ the module for the Intrastat Product Declaration for Belgium</li>
 <li><a class="reference internal" href="#installation" id="id1">Installation</a></li>
 <li><a class="reference internal" href="#configuration" id="id2">Configuration</a></li>
 <li><a class="reference internal" href="#usage" id="id3">Usage</a></li>
-<li><a class="reference internal" href="#bug-tracker" id="id4">Bug Tracker</a></li>
-<li><a class="reference internal" href="#credits" id="id5">Credits</a><ul>
-<li><a class="reference internal" href="#authors" id="id6">Authors</a></li>
-<li><a class="reference internal" href="#contributors" id="id7">Contributors</a></li>
-<li><a class="reference internal" href="#maintainers" id="id8">Maintainers</a></li>
+<li><a class="reference internal" href="#known-issues-roadmap" id="id4">Known issues / Roadmap</a></li>
+<li><a class="reference internal" href="#bug-tracker" id="id5">Bug Tracker</a></li>
+<li><a class="reference internal" href="#credits" id="id6">Credits</a><ul>
+<li><a class="reference internal" href="#authors" id="id7">Authors</a></li>
+<li><a class="reference internal" href="#contributors" id="id8">Contributors</a></li>
+<li><a class="reference internal" href="#maintainers" id="id9">Maintainers</a></li>
 </ul>
 </li>
 </ul>
@@ -444,8 +445,13 @@ the customization or new method is required for multiple countries).</p>
 </li>
 </ul>
 </div>
+<div class="section" id="known-issues-roadmap">
+<h1><a class="toc-backref" href="#id4">Known issues / Roadmap</a></h1>
+<p>The declaration is based upon the invoices of the corresponding tax declaration period.</p>
+<p>An option to generate the intrastat declaration based upon the dates of the physical movements of goods is currently not available.</p>
+</div>
 <div class="section" id="bug-tracker">
-<h1><a class="toc-backref" href="#id4">Bug Tracker</a></h1>
+<h1><a class="toc-backref" href="#id5">Bug Tracker</a></h1>
 <p>Bugs are tracked on <a class="reference external" href="https://github.com/OCA/intrastat-extrastat/issues">GitHub Issues</a>.
 In case of trouble, please check there if your issue has already been reported.
 If you spotted it first, help us smashing it by providing a detailed and welcomed
@@ -453,9 +459,9 @@ If you spotted it first, help us smashing it by providing a detailed and welcome
 <p>Do not contact contributors directly about support or help with technical issues.</p>
 </div>
 <div class="section" id="credits">
-<h1><a class="toc-backref" href="#id5">Credits</a></h1>
+<h1><a class="toc-backref" href="#id6">Credits</a></h1>
 <div class="section" id="authors">
-<h2><a class="toc-backref" href="#id6">Authors</a></h2>
+<h2><a class="toc-backref" href="#id7">Authors</a></h2>
 <ul class="simple">
 <li>brain-tec AG</li>
 <li>Akretion</li>
@@ -463,14 +469,14 @@ If you spotted it first, help us smashing it by providing a detailed and welcome
 </ul>
 </div>
 <div class="section" id="contributors">
-<h2><a class="toc-backref" href="#id7">Contributors</a></h2>
+<h2><a class="toc-backref" href="#id8">Contributors</a></h2>
 <ul class="simple">
 <li>Alexis de Lattre, Akretion &lt;<a class="reference external" href="mailto:alexis.delattre&#64;akretion.com">alexis.delattre&#64;akretion.com</a>&gt;</li>
 <li>Luc De Meyer, Noviat &lt;<a class="reference external" href="mailto:info&#64;noviat.com">info&#64;noviat.com</a>&gt;</li>
 </ul>
 </div>
 <div class="section" id="maintainers">
-<h2><a class="toc-backref" href="#id8">Maintainers</a></h2>
+<h2><a class="toc-backref" href="#id9">Maintainers</a></h2>
 <p>This module is maintained by the OCA.</p>
 <a class="reference external image-reference" href="https://odoo-community.org"><img alt="Odoo Community Association" src="https://odoo-community.org/logo.png" /></a>
 <p>OCA, or the Odoo Community Association, is a nonprofit organization whose