HMRC letter codes · Child Benefit (CH)
CH459Tell HMRC your child has left education or training
Last reviewed 14 October 2026 · How Tax Letters checks its facts
In short
GOV.UK says the CH459 online service is used to tell the Child Benefit Office that your child aged 16 or over has left approved education or training.
“Use the online service (CH459) to tell the Child Benefit Office that your child aged 16 or over has left approved education or training.”
GOV.UK: Tell the Child Benefit office that your child has left education · checked 14 October 2026
Information, not advice: this page reports what HMRC, GOV.UK and the bodies named publish about CH459. Each fact has its source and the day it was checked beside it.
What it asks
GOV.UK's page for the CH459 online service says only the Child Benefit claimant, the person who claimed Child Benefit, can tell the Child Benefit office about a change of circumstances.
“Only the Child Benefit claimant can tell the Child Benefit office about a change of circumstances.”
GOV.UK: Tell the Child Benefit office that your child has left education · checked 14 October 2026
How to send it or apply
GOV.UK says the CH459 online service needs you to sign in, and that if you do not already have sign in details you can create them.
“You’ll need to sign in to use this service. If you do not already have sign in details, you’ll be able to create them.”
GOV.UK: Tell the Child Benefit office that your child has left education · checked 14 October 2026
Free help and HMRC contacts
If you cannot find the answer in the official HMRC app, GOV.UK says to call HMRC on 0300 200 3100 with a question about Child Benefit, including one about a CH459 change of circumstances. Lines are open Monday to Friday, 8am to 6pm, closed bank holidays, and GOV.UK links to its call charges page.
“Call HMRC if you have a question about Child Benefit and you cannot find an answer in the official HMRC app. … Telephone: 0300 200 3100 … Opening times: Monday to Friday, 8am to 6pm. Closed bank holidays. … Find out about call charges”
GOV.UK: Child Benefit: enquiries · checked 14 October 2026
Free help first
These routes are described by GOV.UK, TaxAid and Citizens Advice themselves.
- HMRC's extra supportHMRC offers extra support if your health condition or personal circumstances make it difficult to contact HMRC, for example a mental health condition, financial hardship or being treated in hospital.
- Someone to deal with HMRC for youYou can authorise a friend, relative or voluntary organisation to talk to HMRC for you and help you fill in forms.
- TaxAidTaxAid helps people with tax problems who cannot pay for advice. Tax Help for Older People merged with TaxAid in July 2025.
- Citizens AdviceCitizens Advice gives confidential advice online, over the phone and in person, for free.
- GOV.UK: Tell the Child Benefit office that your child has left education (checked 14 Oct 2026)
- GOV.UK: Child Benefit: enquiries (checked 14 Oct 2026)
- GOV.UK: Get help from HMRC if you need extra support (checked 7 Oct 2026)
- GOV.UK: Appoint someone to deal with HMRC on your behalf (checked 7 Oct 2026)
- TaxAid: About us (checked 8 Oct 2026)
- Citizens Advice: About us (checked 7 Oct 2026)