Query Inland Revenue Working for Families, Best Start, Minimum Family Tax Credit, In-Work Tax Credit, and FamilyBoost public rate/threshold parameters. Use when the task involves NZ family entitlement pre-check inputs, WFF tax-credit rates, abatement thresholds/rates, Best Start rules, FamilyBoost income caps, or official IRD eligibility source links. Read-only, no login or API key; optional source probes handle IRD availability gracefully.
