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An income tax preparer files your T1 return for you, usually online, and you sign a form saying the numbers are right. That form is the T183, and the CRA says you should read the return before you sign it. Searching for an income tax preparer near you gets you a map of offices. It doesn’t tell you who will do your return properly, so this page covers the part the map skips: what happens once you walk in, and what you should bring.
What happens when a preparer files your return?
You hand over your slips and receipts. The preparer enters them, checks the result with you and sends the return to the CRA electronically, for a fee. Before it goes, you review the return and the T183 and sign to authorize the filing. The CRA lists your obligations plainly: give complete income and expense information, read what’s prepared, and keep your papers.
The filing itself takes minutes. The time goes into finding what you forgot. That’s why a preparer who asks a lot of questions is a better sign than one who says “just leave it with me”.
The CRA’s page on using a professional tax preparer says the information on the T183 must be the same as the information in your electronic return. So read the two side by side before you sign. If a number differs, ask why, and don’t sign until you’re satisfied.
What should you bring to an income tax preparer?
Bring everything that arrived with a tax number on it, and a few things that didn’t.
- Slips: T4, T4A, T5, T3, T4E, and any RRSP or FHSA receipts
- Your last notice of assessment, which shows your RRSP room and carries the access code for online filing
- Receipts for childcare, tuition, moving costs, donations and medical costs
- Rent or property tax paid, if your province has a credit for it
- Your spouse’s or partner’s income, since some claims use family income
The notice of assessment matters more than most people think. The CRA says the eight character access code on it speeds up online filing, though it isn’t mandatory, and first-time filers won’t have one.
What should you ask before you hand anything over?
Three questions are enough. How much will it cost, and is that the whole price or does it climb with each form? We haven’t confirmed typical fees, so get the number in writing. Who will actually prepare the return, and who checks it? And will you get a full copy afterwards, including the T183?
Take Fatima in Mississauga. She asks the first two on the phone, books a Tuesday evening in February, and brings her slips in a folder. She’s out in half an hour with a copy she can email to herself. Compare that with showing up at tax time, on 29 April, with a shoebox: it works, but you’ll have fewer choices and less time to review.
Does your preparer need access to your CRA account?
Sometimes. It saves retyping slips, because the preparer can pull your tax information. Since 15 July 2025, an individual’s authorization can’t be requested through the preparer’s EFILE service any more. It goes through “Represent a Client”, and you either add the preparer in your own account or confirm their request. The CRA says the old five day delay is gone, so access is instant once you agree. If you can’t get into your account, a notice of assessment at least six months old can be used instead.
How much is a preparer worth on $45,000?
Try a real case. An Ontario employee earns $45,000 and has $5,200 withheld. The tax refund calculator puts the tax for the year at $5,243.01, so there’s a balance owing of $43.01. That’s a return where paying for help makes little sense, unless a fee is under that gap, and it never is.
Now change one thing. The same person also drove for a delivery app. That income isn’t on a T4, and it changes the return: the self-employed tax calculator shows what tax and CPP look like once the earnings are counted, though it doesn’t include EI and it applies your expenses to income tax only. Here a preparer who knows which costs are allowed could earn back their fee, and the deadline moves to 15 June for filing, with tax owing still due 30 April.
| Your return has | Reasonable first move |
|---|---|
| One T4 and standard credits | Certified software, or a free clinic if income is modest |
| Self-employment or rental income | A preparer who names those cases up front |
| Years of unfiled returns | A preparer or accountant, and ask about the CRA’s process before you pay |
| A CRA letter you don’t follow | Call the number on the letter first, then ask for help |
What goes wrong with preparers?
The CRA names the warning signs. A preparer who promises big refunds before seeing your papers is one. So is one who suggests claims that aren’t yours: donations you didn’t make, child care you didn’t pay, expenses you never had. If they’re wrong, you’re the one answering to the CRA.
Some preparers also won’t hand over a copy. Ask for one, always. And expect to hold your records for at least six years, including the completed T183.
Keep all your tax slips, receipts, and the completed Form T183 for at least 6 years.
Using a professional tax preparer, canada.ca
If your income is modest and your return is simple, a free clinic may be open to you. We can’t give you a cut-off, because clinics can adjust their own, so ask the one you’re thinking of.
Want to see the number before you meet anyone? The income tax calculator gives a rough total for your province, and the tax credits calculator covers federal credits only.
Where this information comes from
Deadlines and the preparer process follow the Canada Revenue Agency‘s guidance for the 2025 return. Dates for the 2026 return aren’t published yet. Example figures come from our 2026 tax engine and are estimates. We have no connection with the CRA, and we don’t recommend or rate any preparer.
Frequently asked questions
What is Form T183?
It's the form you sign to authorize your preparer to file your return electronically. Read the return before you sign, and keep the completed form for at least six years.
What do I need for my first appointment?
Your slips, receipts, last notice of assessment and your spouse's income if it affects a claim. First-time filers won't have a notice yet.
How does my preparer see my CRA information?
Through the Represent a Client service, where you add them or confirm their request. Requests for individuals no longer go through EFILE.
Do I pay tax owing on 30 April even if I file later?
Yes. If you or your partner was self-employed, the filing date moves to 15 June for the 2025 return, but payment was still due 30 April.
Can the preparer promise a refund?
No. A refund comes from your slips and claims. The CRA lists unusually large refunds as a warning sign.
- How to choose a tax preparer in Canada
How to decide if you need a tax preparer, what a preparer does, the questions to ask before you hire one and where to find free help in Canada