Neither TAC nor TAF is defined in statute. They describe a way of working: the practitioners involved with a family, such as the school, health visitor or school nurse, family support worker and youth worker, meet with the family to agree a plan and review progress, coordinated by a lead practitioner.
Working Together 2026 uses the idea without making it a formal process. It says effective Family Help relies on regular meetings between the multi-disciplinary practitioners working with a family, and a Family Help plan designed with the child and family (paragraph 136). It points to the Families First Partnership programme guide for how lead practitioners coordinate a "multi-disciplinary team around the family" (paragraph 138).
For schools, a TAF meeting is often where the DSL, pastoral lead or SENCO reports on attendance, behaviour and wellbeing, and agrees actions. KCSIE 2026 says school staff may support a Family Help assessment and sometimes act as lead practitioner, coordinating the support (paragraph 64).
Local variation. Some areas say TAC, others TAF, team around the school, or simply Family Help review meeting. Don't confuse a TAF with a child protection core group, which meets because a child has a child protection plan.