What Form T2203 Does and Who Files It

Form T2203 is the Canadian federal form you use to claim the Disability Tax Credit (DTC) on your tax return once you have already been approved for the DTC certificate. It is not the process form itself — that is a separate process handled by Service Canada. Form T2203 tells the Canada Revenue Agency (CRA) that you hold a valid DTC certificate and want to claim the tax credit for the year you are filing.

You only file Form T2203 if you have received a Notice of Assessment from Service Canada confirming your DTC approval. The form goes into your tax return package each year you claim the credit. If you are approved mid-year, you can claim the credit starting from the year of approval, even if you did not have the certificate for the entire year.

Some people are approved for the DTC but do not need to file Form T2203 themselves — for example, if you have no income or very low income, or if someone else (a spouse or parent) is claiming the credit on your behalf. In those cases, the person claiming the credit files the form instead.

Key Takeaways

  • Form T2203 is filed only after you have been approved for the Disability Tax Credit by Service Canada and received your Notice of Assessment.
  • You attach Form T2203 to your annual tax return to claim the federal DTC amount, which reduces the tax you owe or increases your refund.
  • The form requires your Social Insurance Number, your DTC certificate number, and confirmation of the year the certificate became valid.
  • If your DTC certificate expires or is revoked, you must stop claiming the credit and notify the CRA.
  • You can file Form T2203 yourself, or a spouse, parent, or tax professional can file it on your behalf if you authorize them.

When You Need to File Form T2203

You file Form T2203 in the tax year after you receive your DTC approval letter from Service Canada. If you are approved in January 2024, for example, you would first claim the credit on your 2024 tax return, filed in spring 2025. You continue to file it every year your certificate remains valid.

If your DTC certificate has an expiry date, you can only claim the credit for the years it covers. Service Canada will tell you the expiry date in your approval letter. If your certificate is revoked before the expiry date, you stop claiming the credit when ready and should notify the CRA in writing.

You do not need to reapply for the DTC each year — once approved, the certificate remains valid until the expiry date unless Service Canada revokes it. However, Service Canada may ask you to provide updated medical information before the expiry date to confirm you still meet the criteria. This is called a recertification, and it is separate from your tax filing.

Information You Need Before You File

Gather these items before you complete Form T2203:

  • Your Social Insurance Number (SIN)
  • Your DTC certificate number (found on your Notice of Assessment from Service Canada)
  • The year your DTC certificate became valid (also on the Notice of Assessment)
  • Your net income for the tax year (from your completed tax return)
  • Information about any dependents if you are claiming the Caregiver Amount or other related credits

If you are filing on behalf of someone else — for example, as a parent claiming the DTC for a child — you will also need that person's SIN and their net income for the year.

Keep a copy of your Notice of Assessment in a safe place. You may need it if the CRA asks questions about your DTC claim, or if you need to prove your approval to another organization (such as a provincial disability support program).

How to Complete Form T2203

Form T2203 is a one-page form with a small number of fields. You can obtain it from the CRA website, from your tax software, or by calling 1-800-959-5525. The form is also available in large print and Braille if you request it.

Fill in the following sections:

  • Your identification: Your name, SIN, and mailing address.
  • DTC certificate information: Your DTC certificate number and the year it became valid.
  • Dependents (if applicable): If you are claiming the Caregiver Amount or the amount for an infirm dependent, list their name, SIN, and net income.
  • Signature: Sign and date the form. If someone else is filing on your behalf, they sign as the authorized representative.

Do not leave fields blank — if a section does not explore to you, write "N/A" or "0" as appropriate. The CRA will reject incomplete forms and ask you to resubmit.

If you use tax software (such as NETFILE-certified software), the software will often fill in Form T2203 automatically once you enter your DTC certificate number. Review the completed form before you submit to make sure all information is correct.

Filing Form T2203 With Your Tax Return

Form T2203 is filed as part of your annual income tax return, not separately. You include it in your return package when you file by mail, or you upload it if you file online through NETFILE.

If you file by mail, send Form T2203 along with all other required forms and documents to the CRA tax centre for your province. The address is on the CRA website and on your tax package.

If you file online through NETFILE, your tax software will prompt you to upload Form T2203 as part of the return. Make sure your software is NETFILE-certified and that you have your CRA user ID and password ready.

The important date to file your tax return is June 15 of the year following the tax year. For example, your 2024 tax return (which includes Form T2203 for 2024) is due by June 15, 2025. If you owe tax, you must pay it by April 30, 2025, even if you file the return later.

What Happens After You File Form T2203

Once the CRA receives your return with Form T2203, they will process it along with the rest of your tax return. Processing usually takes 4 to 8 weeks if you file online, or 8 to 12 weeks if you file by mail.

The CRA will send you a Notice of Assessment showing the DTC amount claimed and how it affected your tax owing or refund. Keep this notice — it is proof that you claimed the credit for that year.

The CRA may contact you if there is a problem with your Form T2203 — for example, if your DTC certificate number does not match their records, or if the certificate has expired. If this happens, respond promptly with the requested information. Do not ignore CRA correspondence about your DTC claim.

If Your DTC Certificate Expires or Changes

Your DTC certificate has an expiry date set by Service Canada. You can claim the credit only for the years the certificate is valid. If your certificate expires on December 31, 2026, you can claim the credit on your 2026 tax return, but not on your 2027 return.

Before your certificate expires, Service Canada may ask you to provide updated medical information to confirm you still meet the DTC criteria. This recertification process is handled by Service Canada, not the CRA. If you are recertified, your new certificate will have a new expiry date, and you can continue to claim the credit.

If your DTC certificate is revoked (cancelled) by Service Canada, you must stop claiming the credit when ready. Write to the CRA to notify them of the revocation and provide the date it took effect. If you claimed the credit for a year after the revocation date, you may have to repay part of your refund or owe additional tax.

Frequently Asked Questions

Can someone else file Form T2203 on my behalf?

Yes. A spouse, parent, tax professional, or anyone with your written authorization can file Form T2203 on your behalf. They must sign the form as your authorized representative and include their name and relationship to you. You remain responsible for the accuracy of the information.

What if I was approved for the DTC partway through the year?

You can claim the DTC starting from the year you were approved, even if you did not have the certificate for the entire year. For example, if you were approved in September 2024, you claim the credit on your 2024 tax return. The amount is not prorated — you claim the full annual credit for that year.

Do I have to file Form T2203 every year?

Yes, you file it every year your DTC certificate is valid and you want to claim the credit. If you skip a year, you lose the credit for that year and cannot claim it later. The only exception is if your income is so low that you owe no tax — in that case, you may not need to file a return at all, but you should still file to receive any refundable credits you are owed.

What if the CRA says my DTC certificate number is invalid?

Contact Service Canada to confirm your certificate number is correct. It appears on your Notice of Assessment. If the number is correct but the CRA cannot find it in their system, there may be a delay in their records. Provide the CRA with a copy of your Notice of Assessment and ask them to update their records. Do not guess at the number — an incorrect certificate number will cause your claim to be rejected.

Can I claim the DTC credit if someone else is claiming me as a dependent?

No. Only one person can claim the DTC for a given year. If you are a dependent (for example, a child claimed by a parent), your parent claims the credit on their return. If you are an adult and no one claims you as a dependent, you claim the credit on your own return. Discuss with your family who will claim the credit to avoid duplicate claims, which the CRA will reject.