Condition is this.

VAT textfield - require field validation off when country selected is USA

VAT textfield - require field validation on when country selected is other than USA

  • This field is your custom field? Aug 21, 2017 at 6:55
  • no not a custom field. it is a system field of VAT Aug 26, 2017 at 10:06

1 Answer 1


it's done Using override


validation working.

In this file there are different types of method related to method add jquery validation. Like method i have used : saveNewAddress and setShippingInformation.

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