A Tax Court hearing is decided on evidence — and many self-represented taxpayers lose not because their position is weak, but because they never properly put their proof in front of the judge. The good news: the Informal Procedure is designed to be forgiving, and the mechanics of presenting evidence are learnable. This guide walks through getting documents into the record, preparing and calling witnesses, and the basics of examination, so you can present your case cleanly.

The two kinds of evidence

Evidence comes in two main forms:

Documentary evidence — your receipts, invoices, bank statements, contracts, logbooks, and correspondence.
Testimonial evidence — what you and your witnesses say under oath about what you personally know.

You will usually rely on both: documents to prove the paper trail, and testimony to explain it.

Getting documents into evidence

A document sitting in your binder is not "in evidence" until it is properly introduced. Under the Informal Procedure the judge is not bound by the strict rules of evidence, so this is simpler than in a regular courtroom, but there is still a process:

Have copies ready — one for the judge, one for the Crown, one for you (and one for any witness who needs it).
Introduce the document through a witness who can speak to it — usually you. For example: "This is the invoice from my supplier dated March 3, 2023."
Ask that it be entered as an exhibit. The judge will mark it (Exhibit A-1, A-2, and so on). From then on you can refer to it by exhibit number.
Tie each document to a fact — explain what the document proves and why it matters to the issue.

If you have agreed a joint book of documents with the Crown beforehand, much of this is streamlined — the documents go in by consent and you simply refer to them.

Preparing your witnesses

A witness gives evidence about facts they personally know. Choose witnesses who add something a document cannot — a bookkeeper who can explain how records were kept, a contractor who confirms work was done, a spouse who witnessed a transaction. To prepare a witness:

Confirm what they actually know first-hand. A witness can only testify to what they personally saw, heard, or did — not to what someone told them.
Walk them through the topics you will ask about, so there are no surprises — but never tell a witness what to say. They must tell the truth in their own words.
Make sure they can attend on the hearing date, and bring any documents they need to refer to.

Calling and questioning your witness (examination-in-chief)

When you call your own witness, you ask questions to bring out their evidence. This is called examination-in-chief. The key rules:

Ask open, non-leading questions — "What happened next?" or "Describe how you kept the mileage log." Avoid questions that put words in the witness's mouth ("You drove 14,000 km for business, didn't you?").
Go in order — follow your chronology so the story is easy to follow.
Use documents — "I'm showing you Exhibit A-3. Do you recognize it? What is it?"
Keep it to the issues — every question should help prove a fact that matters.

Cross-examination — both directions

After you finish with your witness, the Crown lawyer may cross-examine them. The Crown can ask leading questions and will test the evidence. Prepare your witnesses for this: the fix is simply to tell the truth, answer the question asked, and not guess.

When the Crown calls its witness — often a CRA auditor — you get to cross-examine. Use it well:

Ask short, pointed questions aimed at specific facts.
It is fine to ask leading questions on cross ("You never reviewed my bank statements, correct?").
Do not argue with the witness — let the answers speak. Save argument for your closing.
Have a goal for each line of questioning; if you do not know why you are asking, do not ask.

Testifying yourself — credibly

In most self-represented appeals you are your own most important witness. Credibility is everything, because the judge has to decide whether to believe you. Habits that build credibility:

Answer the question that was actually asked — then stop talking.
Anchor your answers to documents — "Yes, and that's Exhibit A-5."
Concede what is true, even when it does not help you. Selective memory reads as evasion.
Say "I don't recall" or "I don't know" when that is honest. Guessing that turns out wrong damages everything else you said.
Stay calm and respectful — to the judge and to the Crown lawyer.

The order of events at the hearing

It helps to picture exactly when you will be doing each of these things. A typical Informal Procedure hearing runs in this order:

Opening. The judge confirms the issues and the years in dispute.
Your case. You testify and introduce your documents as exhibits, then call any other witnesses and question them (examination-in-chief).
The Crown's cross-examination of you and your witnesses.
The Crown's case. The Crown calls its witness — often the CRA auditor — and questions them.
Your cross-examination of the Crown's witness.
Closing submissions. Each side summarizes why the evidence supports its result.

Knowing the sequence removes a lot of the fear. You always get to present your own evidence first and fully before anyone challenges it, and you always get a chance to question the CRA's witness.

What makes a document persuasive

Not all documents carry equal weight. As you choose what to introduce, favour records that are:

Contemporaneous — created at the time of the event, not reconstructed for the hearing. A logbook kept all year beats a summary typed last week.
Independent — issued by a third party (a bank, a supplier) rather than created by you.
Consistent — they line up with each other and with your testimony. Contradictions undermine the whole set.
Specific — they show the date, amount, and purpose, not just a total.

A handful of strong, specific, independent documents persuades more than a thick binder of vague ones.

A sample line of questioning

To make examination-in-chief concrete, here is how you might question your own bookkeeper as a witness:

"How long did you keep the books for my business?" (establishes their knowledge)
"How did you record vehicle expenses?" (open, non-leading)
"I'm showing you Exhibit A-4. Do you recognize it?" (introduces the document)
"What is it, and how was it prepared?" (lets the witness explain)
"Were these entries made at the time, or later?" (establishes the records are contemporaneous)

Notice that none of the questions tell the witness what to say. They open a door and let the witness walk through it. That is what makes the evidence credible.

Handling objections and surprises

Under the Informal Procedure the judge is not bound by the strict rules of evidence, so formal objections are far less common than in a regular courtroom. Still, the Crown may raise a concern — for example, that a document is unreliable or that a question calls for hearsay. If that happens, do not be rattled. The judge will tell you how to proceed; often it is enough to rephrase the question or to explain where a document came from. If you are surprised by a document the Crown produces, you can ask the judge for a short moment to review it. Staying calm and asking for what you need is always acceptable.

Dealing with missing documents

What if originals are lost? You can still prove a fact with secondary evidence: bank or credit-card statements showing the payment, a duplicate from the vendor, a consistent contemporaneous logbook, or your own testimony explaining the loss and reconstructing the amount. The judge weighs how reliable and consistent your reconstruction is — so be thorough and honest about what you have and how you arrived at the numbers.

Evidence-day checklist

☐ Three (or more) copies of every document, tabbed and numbered.
☐ A plan for introducing each key document as an exhibit.
☐ Each document tied to a specific fact and issue.
☐ Witnesses confirmed, prepared, and available on the date.
☐ Open, non-leading questions drafted for my own witnesses.
☐ Targeted cross-examination questions for the Crown's witness.
☐ My own testimony rehearsed and anchored to exhibits.
☐ A reconstruction plan for any missing originals.

What to do if a witness cannot attend

Witnesses sometimes fall through — illness, travel, or simple reluctance. If a person whose evidence matters cannot come voluntarily, the Tax Court can issue a summons (a subpoena) requiring them to attend, which you request from the registry in advance. Plan ahead: confirm availability early, and if a key witness is uncertain, raise the summons option well before the hearing rather than on the morning of. Where a witness genuinely cannot attend at all, ask the court in advance how it would like the evidence handled — do not simply assume a written note will be accepted in their place, because second-hand statements carry far less weight than a witness the judge can question.

A short word on demeanour

Judges decide credibility partly on how you present. None of this requires polish — it requires composure. Arrive early, dress neatly, address the judge as "Justice" or "Your Honour," wait your turn, and keep your tone even even if the Crown's questions feel pointed. Calm, organized, and honest beats slick every time, and it is entirely achievable for any self-represented taxpayer who has done the preparation.

When the evidence gets complicated

Presenting documents and your own testimony is well within the reach of a prepared self-represented taxpayer. Where you have technical valuation issues, an expert witness, or contested credibility on large amounts, a tax lawyer's experience with the rules of evidence can make a meaningful difference. To see how this fits the wider proceeding, read preparing your own Tax Court case and our Tax Court of Canada page.

How to Present Evidence and Witnesses at the Tax Court (Self-Rep Guide)