You may be able to claim if you are responsible for a child under 16, or under 20 if they remain in approved education or training. The child will usually live with you; if they do not, you may still qualify in some circumstances, such as contributing towards their upkeep and nobody else claiming for them. Only one person can receive Child Benefit for each child, and you should check how your income could affect the High Income Child Benefit Charge. For the full eligibility checklist and current rules, use the official GOV.UK guidance.