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Contact us if you disagree with an assessment or decision regarding your tax or child support. We'll see what we can do to resolve the issue.

If we cannot resolve the issue and you still disagree with our decision or assessment, you may need to follow a formal process. 

Disputing a child support decision or assessment

There are separate rules around how you challenge a child support decision or assessment. Find out what applies to you.

Child support reviews, objections and exemptions

Disputing a general tax decision or assessment 

The formal disputes process makes sure your rights are protected if the matter goes to court. 

You may start the disputes process if the either of the following applies and you've been unable to resolve the issue with us.

  • You disagree with a disputable decision or assessment we've made.
  • You want to propose an adjustment to your tax return. 

We may start the disputes process if we disagree with a return you've filed and have been unable to resolve the issue with you. 

Find out how the disputes process works in each situation and what you need to do.