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Form T400A: The CRA Notice of Objection Form

Filing a Notice of Objection involves completing a T400A form. But it can often be much more complicated. If objecting a large tax assessment, experienced professionals such as Farber tax can help you help you fight a CRA assessment by filing a Notice of Objection and taking care of the whole dispute process.

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Filing a T400A Form: Notice of Objection


If you disagree with a Canada Revenue Agency (CRA) Notice of Assessment or Notice of Reassessment, the first step is often to contact the CRA to discuss the issue. However, the CRA can be very difficult to communicate and negotiate with, so you may not find much success. The next step is to complete and file and formal Notice of Objection. This is done by completing the T400A form. However, there are many specifics that you’ll need to be aware of if you want your objection to be successful.


Notice of Objection Time Limits


You must object to CRA claims in a timely manner. For individuals, this means that you must submit your objection within one year of the tax filing deadline for the return in question, or 90 days after the date printed on your Notice of Assessment or Reassessment, whichever is later.

You may be able to have this timeframe extended, as long as you apply for the extension within one year of the filing deadline. When you request an extension, you must explain why you were unable to file on time, prove that you always intended to file on time, and show that you requested an extension as soon as possible.


How to File a Notice of Objection


Filing a successful Notice of Objection involves more than just completing a T400A form. It’s critical that you take the time to explain in detail why you believe the CRA has made an error, and why your objection should be accepted. The more proof that you can provide to back up your claims, the greater your chance of success.

Once you file, the CRA Appeals Office will inform you that your objection has been received. The office will then review your case and determine whether or not your objection is valid. The timeframe for this review and determination will depend on several factors, and it will vary for each case.


Beyond the T400A Form


While completing and submitting the T400A form is technically all you need to do to object to a CRA assessment or reassessment, if you want to give yourself the best chance at having your objection accepted, it is very beneficial to work with an experienced professional.

Your Notice of Objection should include specific details as to where and how you believe the CRA is incorrect, and these points must be backed up with evidence, such as documents, invoices, receipts, or other forms of proof. Having a well-formed, logical, and persuasive case will give you a significantly higher chance of your objection being successful. This involves a deep understanding of CRA processes and tax law that often only professionals have.

The team at Farber Tax Solutions is made up of experienced legal, accounting, and ex-CRA professionals. We understand the ins-and-outs of tax law and can work with you to complete your T400A form, giving you the best chance of a successful objection. If you have missed the deadline to file an extension and wish to request an extension, we can help you prepare your request, providing you with the greatest likelihood of acceptance.

If your objection is reviewed by the CRA Appeals Division, this can lead to appeals in the Tax Court of Canada and the Federal Court of Appeal as well as, potentially, the Supreme Court of Canada. In these situations, it is incredibly beneficial to have experienced tax professionals on your side.

We have worked with hundreds of individuals and organizations to successfully object to CRA assessments and reassessments. Contact us today to find out how we can help you.


Farber Tax Solutions can help you successfully deal with CRA problems. We utilize the experience of our tax experts to:

  • 1| Offer a comprehensive solution that is focused on achieving the most favourable possible outcome for your tax issue;
  • 2| Communicate with the CRA on your behalf and navigate the entire CRA dispute process; and
  • 3| Offer a complete solution to your tax problems, including ex-CRA professionals and tax lawyers from Farber Tax Law.