Add tax_id on invoice print out

resources/views/invoices/pdf.blade.php

@@ -89,6 +89,10 @@
                         <h4 style="margin: 30px 3px 0;">{{ trans('invoice.due_date') }}</h4>
                         <p>{{ dateId($invoice->due_date) }}</p>
                     @endif
+                    @if ($taxId = Option::get('agency_tax_id'))
+                        <h4 style="margin: 30px 3px 0;">{{ __('agency.tax_id') }}</h4>
+                        <p>{{ $taxId }}</p>
+                    @endif
                 </td>
             </tr>
             <tr><td colspan="3">{{ trans('invoice.items') }} :</td></tr>