Here we need to check a checkbox named Wholesale Order in the destination record if the customer in the sales order record is with the ID 255507.
So in the Import mapping select the Destination as Wholesale Order and click on the settings option near to that.
Select the Field mapping type as Multi-Field
Expression as: {{#compare [Touchstone cusomer ID] “==” “255507”}}T{{else}}{{/compare}}
In this way, it is possible to check the field Wholesale Order in the destination record for a particular customer