With GCSE results released on Thursday for young people across Northern Ireland, parents are being warned that their child's educational status could impact the benefits they receive.
HMRC has asked that parents who receive Child Benefit and Child Tax Credits to tell them what their child plans to do now that they have their results.
The August 31 deadline for updating accounts is one week away.
The process for updating accounts can be carried out online using the Personal Tax Account.
Parents are required to let HMRC know if any of their children are over the age of 16 and continuing in full-time education or starting an apprenticeship.
If a young person is leaving education to start full-time work or because their course has ended, parents are urged to update their status to prevent the overpayment of benefits which will later have to be repaid.
Parents can continue to claim for teenagers aged between 16 and 19 if they are still in full-time education.
"Congratulations to all students getting their results today. Once parents or guardians know what their child has decided to do it’s really important they let us know as soon as possible, so they continue to get the right benefits and credits," said Angela MacDonald, director general of customer services.
Alternative methods for contacting HMRC are by calling 0300 200 3100 or by writing to: Child Tax Credits, Tax Credits Office, Preston, PR1 4AT and/or Child Benefit Office, PO Box 1, Newcastle Upon Tyne, NE88 1AA.