diff --git a/app/assets/javascripts/templates/registration/about.html.haml b/app/assets/javascripts/templates/registration/about.html.haml
index 4343daaab7..be9948b95d 100644
--- a/app/assets/javascripts/templates/registration/about.html.haml
+++ b/app/assets/javascripts/templates/registration/about.html.haml
@@ -44,10 +44,12 @@
           .small-12.columns
             .field
               %label{ for: 'enterprise_charges_sales_tax' }= t(:charges_sales_tax)
-              %input{ id: 'enterprise_charges_sales_tax_true', type: 'radio', value: 'true', ng: { model: 'enterprise.charges_sales_tax' } }
+              %input{ id: 'enterprise_charges_sales_tax_true', type: 'radio', name: 'charges_sales_tax', value: 'true', required: true, ng: { model: 'enterprise.charges_sales_tax' } }
               %label{ for: 'enterprise_charges_sales_tax_true' } Yes
-              %input{ id: 'enterprise_charges_sales_tax_false', type: 'radio', value: 'false', ng: { model: 'enterprise.charges_sales_tax' } }
+              %input{ id: 'enterprise_charges_sales_tax_false', type: 'radio', name: 'charges_sales_tax', value: 'false', required: true, ng: { model: 'enterprise.charges_sales_tax' } }
               %label{ for: 'enterprise_charges_sales_tax_false' } No
+              %span.error.small-12.columns{ ng: { show: "about.charges_sales_tax.$error.required && submitted" } }
+                You need to make a selection.
 
     .row.buttons.pad-top
       .small-12.columns