Income declaration form (CS1668)

Use this form to provide an income declaration if your taxable income has not yet been assessed by the Australian Taxation Office (ATO).

Use the form that relates to the financial year you are declaring your income for.

We use your adjusted taxable income to calculate your child support assessment.

Complete the form online using your Child Support online account through myGov. Read about how to register for a Child Support online account.

To fill in this form digitally you will need a computer and Adobe Acrobat Reader, or a similar program. You can download Adobe Acrobat Reader for free. If you can’t complete the form digitally, you can print it, complete it by hand and return it to us following the instructions on the form.

If you have a disability or impairment and use assistive technology, you may not be able to access our forms. If you can’t, please use self service, request someone to deal with us on your behalf, or contact us. We can help you access, complete and submit them.

Page last updated: 17 November 2022