TCM1000297 - How to check for a match on Child Benefit Service You should check the other guidance available on GOV.UK from HMRC as Brexit updates to those pages are being prioritised before manuals. Note: You should check the guidance available on GOV.UK from HMRC (link is external) as Brexit updates to those pages are being prioritised before manuals. Step 1 using the ‘search’ facility, enter the customer’s NINO and select ‘search’ check the details in the left-hand side bar to make sure you have the right customer where the customer has a Child Benefit record, you will see an ‘account summary’ screen