First time filing taxes in Canada: a step-by-step guide

What does first time filing taxes in Canada involve?

A first tax return is the first T1 Income Tax and Benefit Return the Canada Revenue Agency (CRA) receives under your social insurance number. Until that return is assessed, the CRA has no income history for you, which is why several services stay closed to first-time filers.

The return itself is the same form everyone files. What changes is the setup: you have no NETFILE access code, no carryforward amounts from past years, no CRA account yet, and possibly a date of entry to Canada to report. The rest of this page walks through each of those points in order.

For the 2026 tax year, most people must file and pay any balance by April 30, 2027, a Friday. Self-employed people and their spouses or common-law partners have until June 15, 2027 to file, but any amount owing is still due April 30 (CRA, important dates for individuals).

Why file your first return if you had little or no income?

File because the return is how the CRA decides who gets benefit and credit payments, not only who owes tax. The CRA says filing every year is a requirement to keep receiving the benefits you qualify for, and a first return with zero income still opens those doors.

• Benefit payments: the quarterly credit the CRA now lists as the Canada Groceries and Essentials Benefit, the Canada Child Benefit and most provincial credits are calculated from your return. Payment dates and amounts are published by the CRA and Service Canada on their own benefit pages.
• A refund of tax already taken: if an employer withheld income tax from a part-time job and your income was below the $16,452 basic personal amount for 2026, the federal portion comes back to you.
• RRSP room: 18% of earned income becomes registered retirement savings plan room, up to the annual limit ($33,810 for 2026 and $35,390 for 2027). Room only builds when a return reports the income.
• Carryforwards: unused tuition amounts and student loan interest are recorded only after a return is filed.
• Access to CRA services: registering for a CRA account and signing up for direct deposit through your bank both depend on having a filed return.

What documents do you need for a first time tax return in Canada?

You need your SIN, every tax slip issued to you for the year, receipts for anything you plan to claim, and a few personal details the software will ask for. Slips for 2026 must be issued by the end of February 2027, so wait until early March before filing if you expect more than one.

Newcomers also need the exact date they became a resident, and anyone who moved provinces needs to know where they lived on December 31, because that province sets the provincial tax for the whole year. Newcomers also apply for benefits separately: form RC151 for the Canada Groceries and Essentials Benefit (an online web form if you have no children under 19, or the paper form with proof of birth if you do), or form RC66 instead if you are eligible for the Canada Child Benefit, because the CRA uses it to assess both.

How to file your first tax return in Canada online

The fastest route is NETFILE, the CRA service that accepts returns sent directly from certified tax software. The CRA publishes a list of certified products, and several are free. For the 2026 season NETFILE opened on February 23, 2026; the opening date for the 2027 season is not yet announced and is usually published in the fall.

1. Confirm you have a SIN. NETFILE accepts a SIN or a CRA temporary tax number (TTN) starting with 01 or 03, and the CRA may issue a TTN when Service Canada cannot give you a SIN. Without either, file on paper with a letter explaining why you do not have a SIN.
2. Wait until all slips arrive, usually by early March.
3. Pick NETFILE-certified software and start a new return, answering yes when it asks whether this is your first return.
4. Enter your legal name exactly as it appears on your SIN record, your date of birth, your address and your marital status on December 31.
5. Enter each slip box by box, then any receipts such as tuition, rent (in provinces with a rent credit) or medical costs.
6. Leave the access code field empty and add your banking details so any refund arrives by direct deposit.
7. Send the return through NETFILE and save the confirmation number the software shows.

Can you NETFILE a first time tax return in Canada?

Yes. The access code is optional, and the CRA uses it only to confirm identity and pre-validate returns from people who already have an assessment on file. A newcomer whose SIN starts with 0 can also use NETFILE, as long as none of the other NETFILE exclusions apply.

Other ways to file

Paper returns are still accepted, but the CRA says they usually take at least 8 weeks to process, against about 2 weeks for an online return. People with a modest income and a simple situation can use a free tax clinic run by the Community Volunteer Income Tax Program, where volunteers prepare and send the return at no charge.

Which guide fits your first return: newcomer, student or senior?

The steps above apply to everyone, but the claims and traps differ a lot by situation. Use the table to find the page written for you.

Two narrower pages support the seniors guide: the age amount on line 30100, and the line 23500 social benefits repayment, which covers how an OAS or EI clawback appears on the return.

What happens after your first return is filed?

The CRA's service standard is to issue a notice of assessment within 2 weeks of an online return. That notice confirms your income, your refund or balance, your RRSP deduction limit and any unused tuition. Our notice of assessment guide explains each part of it.

1. Keep the notice: it holds the 8-character access code you will enter next year (see where to find the NETFILE access code).
2. Register for a CRA account using figures from the assessed return. Since February 9, 2026 the CRA no longer sends notices through tax software: they appear in your CRA account, and if you have no account yet the notice is mailed to the address on file.
3. Pay any balance by April 30, 2027 to avoid interest. If you file late with a balance, the penalty is 5% of the amount owing plus 1% per full month, up to 12 months.
4. Set up direct deposit so refunds and benefit payments arrive faster.

Common mistakes when first time filing taxes with the CRA

• Filing before every slip arrives. A missing T4A or T5 leads to a reassessment months later, often with interest.
• Typing a name that does not match the SIN record. The CRA matches your name, date of birth and SIN, and details that do not line up can stop a first NETFILE transmission.
• Skipping the return because income was low. This delays benefit payments and loses the RRSP room the income would have created.
• Claiming tuition you already transferred. A student who signed tuition over to a parent cannot also carry that same amount forward.
• Leaving out the date of entry. Newcomers who skip it get the full-year basic personal amount on the draft, which the CRA will correct.