Updated Checked by the Tax-Services.ca editorial team How we check
Tax filing services in Canada run from free volunteer clinics to a certified preparer who sends your return to the CRA by EFILE. Whichever you pick, you sign Form T183 Part F to give the preparer permission to file for you, and you keep that form and your slips for at least six years.
What do tax filing services actually do?
They fill in your return and send it. That’s the core of it. The CRA says a preparer can be a firm, an organization, a discounter or another certified individual, and most people can file electronically through an EFILE service provider. Your preparer tells you if your situation is an exception.
A discounter works differently. It works out your expected refund and pays you a lump sum up front, then collects the refund itself. We couldn’t confirm what any discounter keeps for that, so ask for the figure in dollars before you sign anything.
How do you check a tax filing service before you hire it?
Start with the CRA’s own tax preparer directory, which you search by postal code. It lists preparers certified to file through EFILE, so it answers the first question for you. It doesn’t rate anyone, and it doesn’t tell you what they charge.
Then ask five plain questions. Who will sign and file my return? What will it cost, in writing, and does the price change if I bring more slips? Will you give me a copy of the T183 and the return? What happens if the CRA writes to me next year? And have you done returns like mine, say with rental income or business income?
Never sign a blank form. That one rule saves most of the grief.
Our guide to choosing a tax preparer adds a longer set of checks if you’d like them in one place.
What are the warning signs?
A promised refund before anyone has seen your slips is the loudest one. Nobody can know your result until the numbers are in. Be wary of a service that wants a cut of the refund and won’t say how much in dollars, one that tells you to claim something you didn’t spend money on, or one that has no phone number or address you can reach in June. If a price sounds too good for the work involved, ask what’s left out.
What should you bring?
The CRA’s list is short: your tax slips, receipts for credits and deductions, and anything else that backs up a number on your return. Our checklist of documents for your tax return is a handy one to print. Check your CRA information too, because a wrong address or old direct deposit details slow a refund down.
| Option | Who does the return | What to check |
|---|---|---|
| Free tax clinic | A volunteer, for modest incomes and simple returns | Whether you qualify, on the CRA page |
| Certified preparer | A firm or individual who files by EFILE | The CRA directory, the fee, the T183 |
| Discounter | A preparer who pays your expected refund up front | What they keep, in dollars |
| Software | You, using CRA-certified software | That it supports your tax year |
Do you need a service, or is your return simple?
Depends on the return. Take an Ontario employee earning $60,000 with $8,000 of tax withheld. Our tax refund calculator puts the tax for the year at $8,320.50, so this person owes $320.50. That’s a return one evening with software can handle, using 2026 rules.
Now a self-employed person with $50,000 of net business income in Ontario. The self-employed tax calculator shows $5,961.64 of income tax and $5,533.50 of CPP, both halves, so $11,495.14 in all. Business expenses, GST/HST and instalments make that return harder, and paying for help is easier to justify.
Nadia, a nurse in Hamilton with one T4 and a few donation receipts, can do hers at the kitchen table in an evening. Her cousin runs a food truck and needs a different answer. Same filing season, very different returns.
Not sure where you land? Run your own numbers in the income tax calculator first. If the result surprises you, that’s a reason to ask for help.
What goes wrong with filing services?
Lateness costs the most. If you owe tax and file after the deadline, the CRA adds a penalty of 5% of the balance, then 1 point per complete month, capped at 12 months. Owe $1,000 and file three months late? That’s $80, and interest runs on top from the day after the due date. File on time even if you can’t pay, because the penalty only bites when you owe.
Deadlines for the 2025 return were 30 April 2026, and 15 June 2026 for self-employed people, although any balance was still due on 30 April. We couldn’t find the 2026 return dates on a CRA page yet, so check before you plan around them.
The sources behind this page
The penalty rules, the T183 steps and the deadlines are from the Canada Revenue Agency‘s pages, read in September 2026. The example figures come from the calculators on this site, which use 2026 tax data. We’re an independent site, and no government body is behind it.
Frequently asked questions
Where do I find a certified tax preparer?
The CRA has a tax preparer directory you search by postal code. Its listed preparers are certified to file through EFILE.
What is Form T183?
It's the form you sign to let a preparer send your return to the CRA electronically. Keep your copy for at least six years.
What is a discounter?
A discounter works out your expected refund and pays you a lump sum up front. Ask what they keep before you agree.
Is there a penalty for filing late?
Only if you owe tax. It's 5% of the balance, then 1 point per complete month, capped at 12 months.
Can I get my return done for free?
Free tax clinics run by volunteers help people with modest incomes and simple returns. The CRA page explains who qualifies.
- How to file your tax return in Canada: steps and dates
What to gather, when your return is due and how to file in Canada, from the first slip to the notice of assessment that closes the year