Child Benefit is generally claimed by the person responsible for bringing up a child, usually while the child is under 16, or under 20 if they remain in approved education or training. You can claim online or use the official CH2 form on GOV.UK; you will usually need your details, National Insurance number, bank information, the child’s birth or adoption details and the date your claim should start. Only one person can normally claim for each child. Check GOV.UK for the current eligibility rules, especially if your household has higher income or your circumstances have changed.