If you received family tax credit from Work and Income, salary, wages or schedular payments, the information you need to complete Questions 11, 11A and 12 will be on your Summary of Income (previously Summary of Earnings), which Inland Revenue will send you in late May 2019. Inland Revenue sends this automatically if they send you an IR3 return.
Your Summary of Income (SOI) contains the following information:
all your employers throughout the year
your total gross income with tax deducted and ACC earners’ levy paid
any family tax credit paid by Work and Income
your tax credits for payroll donations you’ve made through payroll giving.