which country the customer is from (from form TC648) which tax credits are due, use TCM0320300 (Non-European Union (EU) - entitled to Child Tax Credit (CTC) and/or Working Tax Credit (WTC). Where the customer is entitled to CTC only, the customer has children and is employed, go to Step 5. CTC only, the customer has children and is not employed, go to Step 7. WTC only, the customer has children and is in work, go to Step 5. WTC only, the customer does not have any children and is employed, go to Step 7. Note: Where the customer is entitled to WTC only and has children, they are entitled to any child care element and only have to work 16 hours or more a week.