You can object to a tax reassessment by filing a notice of objection with the Canada Revenue Agency. The notice of objection is a key document because it:
- preserves your right to contest a reassessment; and
- is a pre-condition for instituting an appeal before the Tax Court of Canada, if the matter cannot be resolved at the appeals stage.
When in doubt, you should always serve a notice of objection.
- What is the deadline for serving a notice of objection?
- What if a taxpayer missed the deadline to serve a notice of objection?
- How should the notice of objection be served on the CRA?
- What information should be included in the notice of objection?
- What happens after a taxpayer files a notice of objection?

