# Select the ''User Third party Verification Service'' option.<br />[[Image:IRS_Check.png|link=|500px]]
# Hit the ''Save'' button.
# You will now see a button at the top of the page named ''Third Party Verification Mapping''. Clicking that button brings you to the following page:<br />[[Image:IRS_FieldMapping.png|link=|500px]]
From this page, you can select the [[custom fields]] created on the Transaction that will store the values returned from your search of the external database.