If you receive Statutory Maternity or Paternity or Adoption pay, or Maternity Allowance, up to £100 a week is deducted before calculating earnings for the purposes of tax credits.

So that the calculator can make the correct deduction please enter the number of weeks you received Statutory Maternity or Paternity or Adoption pay or Maternity Allowance for in the relevant tax year.

You should include the income from Statutory Maternity or Paternity or Adoption pay or Maternity Allowance under 'Earnings before tax and national insurance' on the Income for tax credits page.