Update quick_start.md

Author: salomegarnier

source/quick_start.md

@@ -27,7 +27,7 @@ To create your first form:
 | Build from scratch        | Build a form using the KoboToolbox <a href="formbuilder.html" class="reference">Formbuilder</a>.                   |
 | Use a template            | Build a form using a template from the <a href="question_library.html" class="reference">question library</a>.   |
 | Upload XLSForm            | Upload an <a href="edit_forms_excel.html" class="reference">XLSForm</a> file where you have defined your questions.     |
-| Import an XLSForm via URL | Upload an XLSForm file <a href="xls_url.html" class="reference">from an online source</a> such as Google Drive or Dropbox. |
+| Import an XLSForm via URL | Upload an XLSForm file <a href="https://support.kobotoolbox.org/xlsform_with_kobotoolbox.html#importing-an-xlsform-via-url" class="reference">from an online source</a> such as Google Drive or Dropbox. |
 
 
 2. Select **Build from scratch** to create a new form using the KoboToolbox Formbuilder.