Most useful information for separated parents

The pages voted most useful by other website visitors.

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  1. Separated parents
  2. Most useful information

Separation details form (MOD S)

Use this form to let us know you’ve separated from your partner.

  1. Separated parents
  2. Most useful information

Request to change payment collection method form (CS1979)

Use this form if you are the receiving parent and you already have a registered Child Support case with us and you want to change your collection method.

  1. Separated parents
  2. Separating

Guide for newly separated parents

A list of tasks you may want to do when going through separation.

  1. Separated parents
  2. Most useful information

Request for medical information form (CS4597)

Use this form to provide proof to support a request to change a child support assessment.

  1. How to manage your assessment
  2. Managing child support overpayments and debts

How we recover child support debts

We can collect child support debts through deductions, tax refunds, legal action and investigations.

  1. Separated parents
  2. Most useful information

Details of your child’s care arrangements form (FA012)

Use this form to provide information about your child’s care arrangements.

  1. Child support assessment
  2. How we work out your assessment

How your percentage of care affects your child support payments

We consider each parent or non-parent carer’s care of the child as part of our child support assessment. This is their percentage of care.

  1. Child support assessment
  2. How we work out your assessment

Basic child support formula

This formula is for parents with only one child support assessment.

  1. Help for myGov, online accounts and mobile apps
  2. Child Support online help guides

Child Support online account help - Edit addresses

Instructions on how to edit your addresses using your Child Support online account.

  1. Help for myGov, online accounts and mobile apps
  2. Child Support online help guides

Child Support online account help - Update current income

Instructions on how to update your income for the current financial year using your Child Support online account.

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Page last updated: 17 November 2025.
QC 60125