Tax Court Forms and Deadlines: A Checklist for Self-Represented Taxpayers

Half of representing yourself well at the Tax Court of Canada is simply getting the paperwork and the dates right. The forms are not complicated, and the deadlines are knowable — but they are unforgiving. This guide lays out every form, deadline, and fee a self-represented taxpayer needs, and ends with a printable checklist you can work through line by line.

The one document that starts everything: the Notice of Appeal

You begin a Tax Court appeal by filing a Notice of Appeal. Under the Informal Procedure there is no mandatory form — a clear letter is enough, though the court publishes a model you can follow. Your Notice of Appeal should set out:

• your name and address (and an address for service in Canada);
• the tax year(s) and the CRA notice you are appealing, identified by date;
• a statement of the relevant facts;
• the issues you want decided;
• the reasons you say the assessment is wrong;
• the relief you are asking for; and
• an election to use the Informal Procedure, if you qualify.

If you are using the General Procedure (larger disputes), the Notice of Appeal must follow the prescribed form in the General Procedure Rules and is more formal. Most self-represented taxpayers are in the Informal track.

The 90-day appeal deadline

This is the deadline that matters most. You generally have 90 days to file your Notice of Appeal, measured from the date printed on the CRA's notice of confirmation or notice of reassessment that disposed of your objection.

Two things trip people up:

• The clock runs from the CRA's date, not the day you received the letter. Mail delays do not extend it. File early.
• You can also appeal if the CRA has not decided your objection within 90 days of when you filed it. In that case there is no upper deadline created by a CRA decision — but it is usually wise to move once you can.

When you have missed the deadline: extensions of time

Missing the 90 days is not always fatal. You can apply for an extension of time to appeal, but the rules are strict:

1. You must apply within one year after the original 90-day deadline expired — so within 15 months total of the CRA's decision.
2. You must show that, within the original 90 days, you genuinely intended to appeal.
3. You must show it would be just and equitable to grant the extension, and that you applied as soon as circumstances permitted.
4. Your appeal must have reasonable grounds.

The application is itself a small filing to the Tax Court. Treat the extension route as a safety net, not a plan — file on time whenever you possibly can.

Filing fees

• Informal Procedure: there is no filing fee. This is part of what makes the Informal Procedure accessible to self-represented taxpayers.
• General Procedure: a filing fee applies, scaled to the amount in dispute. If the General Procedure applies to your case and the fee is a hardship, you can ask the court about relief.

How and where to file

You can file your Notice of Appeal:

• by mail or courier to any Tax Court of Canada registry;
• by fax to a registry;
• in person at a registry; or
• through the Tax Court's electronic filing portal.

Whatever method you choose, keep proof of the filing date — a courier receipt, a fax confirmation, or an electronic submission confirmation. If timeliness is ever questioned, that proof matters.

Other dates to watch after you file

• The Crown's Reply — 60 days. After you file, Justice Canada has 60 days to file its Reply. Read it as soon as it arrives.
• The hearing date. The court will schedule your hearing and notify you. Confirm your availability promptly and request a change early if you have a genuine conflict.
• Document exchange. Exchange your documents with the Crown ahead of the hearing; coordinate on a joint book of documents if you can.

How to count the 90 days correctly

Getting the deadline math right is worth a careful minute, because being even one day late can cost you the appeal. A few practical pointers:

• Day one is the day after the date on the notice. You count calendar days, not business days.
• Weekends and holidays count in the running of the 90 days — but if the 90th day itself falls on a weekend or a federal holiday, you generally have until the next day the court registry is open.
• The date on the CRA letter governs — not the postmark and not the day it landed in your mailbox. If the letter sat unopened for two weeks, you have already lost two weeks of your window.

When in doubt, treat the deadline as earlier than you think and file with time to spare. There is no advantage to filing on the last possible day, and considerable risk.

What you do — and do not — pay to appeal

Cost is a common worry, so here is the honest picture for a self-represented Informal Procedure appeal:

• No filing fee.
• No requirement to hire a lawyer or any representative.
• Your own out-of-pocket costs are minimal — copying and assembling documents, perhaps travel to the hearing location.
• Costs if you lose are limited and modest under the Informal Procedure, unlike the General Procedure, where a losing party can be ordered to contribute meaningfully to the other side's legal costs.

For most disputes within the dollar limits, the financial barrier to bringing your appeal is close to zero. The real investment is your time and preparation.

Where to find the forms and models

The Tax Court of Canada publishes model documents and practice information on its official website, including a sample Notice of Appeal for the Informal Procedure and guidance on electronic filing. The CRA's notices themselves tell you which office issued the decision and the date that starts your clock. You do not need to buy any forms — a clear letter that contains the required elements is sufficient under the Informal Procedure. Keep your filing simple, complete, and on time.

A note on representation

Under the Informal Procedure you may represent yourself, or you may be represented by a lawyer or, with the court's permission, by an agent such as an accountant. You are not obliged to choose at the outset — many taxpayers file their own Notice of Appeal, prepare their own file, and only consult a tax lawyer if the case turns out to be more complex than expected. Filing on your own does not lock you out of getting advice later.

Printable self-rep checklist

Before you file:

• ☐ I filed a Notice of Objection and received a confirmation/reassessment (or 90 days have passed).
• ☐ I noted the date on the CRA's notice and counted 90 days from it.
• ☐ I confirmed whether I qualify for the Informal Procedure.

The Notice of Appeal:

• ☐ Identifies the year(s) and CRA notice by date.
• ☐ States the facts, the issues, and the reasons the assessment is wrong.
• ☐ States the exact relief I want.
• ☐ Elects the Informal Procedure (if I qualify).
• ☐ Includes an address for service in Canada.

Filing:

• ☐ Filed by mail, fax, in person, or online.
• ☐ Kept dated proof of filing.
• ☐ Paid the General Procedure fee (if applicable; none for Informal).

After filing:

• ☐ Received and read the Crown's Reply (within ~60 days).
• ☐ Calendared the hearing date.
• ☐ Exchanged documents with the Crown.

The objection deadline, for completeness

Because the objection is the step that comes before the appeal, it is worth knowing its deadline too — many taxpayers reach the Tax Court question only after an objection deadline has already caused a problem. For an individual or a testamentary trust, a Notice of Objection to an income tax (re)assessment is generally due the later of 90 days from the date on the notice of assessment and one year after the filing-due date for the return. For other taxpayers and for GST/HST, the deadline is 90 days from the notice. If you miss the objection deadline, there is a separate extension-of-time process at the CRA stage, with its own one-year outer limit. The takeaway: there are two 90-day deadlines in the dispute chain — one for the objection and one for the appeal — and both are easy to lose track of. Calendar each as soon as the triggering notice arrives.

Keep a simple deadline log

A single sheet of paper can prevent the most common and most costly self-rep error. For each dispute, write down:

• the date on the CRA notice;
• the deadline that flows from it (objection or appeal), counted in calendar days;
• the date you actually filed, and the proof you kept;
• the date the next document is expected (such as the Crown's Reply); and
• the hearing date once it is set.

Update it whenever a new letter arrives. Deadlines are the part of self-representation that punishes disorganization hardest — and a one-page log is enough to stay ahead of them.

If the dates have already slipped

If you have missed the 90-day deadline, do not give up — but move fast, because the extension window is finite. A short conversation with a tax lawyer can tell you whether an extension application is realistic and how to frame it. For the broader process, see our Tax Court of Canada page and the Tax Court appeal process overview; for getting your file ready once you are in, see preparing your own Tax Court case.