T1 Tax Return Canada 2027: Everything You Need to File Correctly

Every year, Canadian residents file a T1 General return — the personal income tax form — to report their income, claim deductions and credits, and settle any balance owing or receive a refund. Whether you earned $15,000 from a part-time job or $200,000 as a self-employed consultant, the T1 is how you reconcile your taxes with the Canada Revenue Agency (CRA).

Who Must File a T1 Return?

You must file a T1 return if any of the following apply to you for the tax year:

• You have tax owing to the CRA
• The CRA has sent you a request to file
• You disposed of capital property (sold investments or real estate)
• You have to repay Employment Insurance (EI) benefits
• You received a Home Buyers' Plan or Lifelong Learning Plan withdrawal from your RRSP
• You want to claim a refund, the GST/HST credit, the Canada Child Benefit, or other income-tested benefits

Even if none of these apply strictly, filing every year is strongly recommended. Only by filing can you accumulate RRSP room (18% of earned income), receive GST/HST credit payments, and build your benefit eligibility history.

Key T1 Deadlines for 2027

If April 30 falls on a Saturday or Sunday, the CRA extends the deadline to the following Monday. Check Canada.ca each year for the confirmed dates.

What Slips and Documents Do You Need?

Before filing, gather all income slips and receipts. Here are the most common:

• T4 slip — Employment income (from your employer by end of February)
• T4A slip — Pension, RRSP withdrawals, self-employment commissions, scholarships
• T4E slip — Employment Insurance benefits received
• T3 / T5 slips — Investment income (dividends, interest, trust distributions)
• T2202 — Tuition fees from a post-secondary institution
• T5008 — Proceeds from securities dispositions (stock sales, crypto)
• RRSP contribution receipts — For contributions made in the first 60 days of 2027
• Medical expense receipts — For the Medical Expense Tax Credit
• Charitable donation receipts — For the Charitable Donation Tax Credit

The CRA populates many slips automatically in Auto-fill My Return (available through NETFILE-certified software). You can import T4s, T5s, RRSPs, and more directly from the CRA's system — no manual entry needed for most slips.

How to File: NETFILE vs Paper

NETFILE (strongly recommended) — File electronically using CRA-certified tax software. You transmit your completed return directly to the CRA. Benefits: faster processing (2-week refund vs. 8 weeks for paper), instant confirmation, Auto-fill support, and no mailing delays. Free options include Wealthsimple Tax, SimpleTax, and the CRA's own File My Return (if eligible).

Paper filing — Download Form T1 General from Canada.ca, complete by hand, and mail to your CRA tax centre. Processing takes 8 weeks or more. Required if you are excluded from NETFILE (e.g., first-year filers from abroad, certain trust returns).

Professional filing — A registered tax preparer or accounting firm files on your behalf using professional software. You authorize them through Represent a Client in CRA My Account.

Common Deductions and Credits on the T1

The T1 contains dozens of deductions and credits. Here are the most valuable for most Canadians:

• RRSP deduction — Reduces your taxable income dollar-for-dollar. Contribution room is 18% of prior-year earned income, up to $32,490 for 2026.
• Basic Personal Amount (BPA) — Every Canadian can claim $16,129 (2026) federally without paying any tax. This is automatically applied.
• Canada Employment Amount — Up to $1,433 for employment income, automatically applied.
• Medical Expense Tax Credit — 15% credit on eligible medical costs above 3% of net income or $2,479.
• Charitable Donation Tax Credit — 15% on first $200, 29%–33% above $200.
• Child care expenses — Deductible for children under 16, up to $8,000/child under 7.
• Union and professional dues — Fully deductible from employment income.

Benefits Triggered by Filing Your T1

Filing your T1 on time is the trigger for several important payments. These are not delivered automatically — the CRA calculates them only after your return is assessed:

• Canada Child Benefit (CCB) — Up to $7,787/year per child under 6. Recalculated every July based on your prior-year return.
• GST/HST Credit — Quarterly tax-free payments up to $519/year for individuals.
• Canada Carbon Rebate — Quarterly payments for residents of applicable provinces.
• Ontario Trillium Benefit — Monthly Ontario energy, property tax, and sales tax credits.

Failing to file — even if you had no income — means these payments stop. The CRA cannot pay benefits without assessing your return.

After You File: Understanding Your Notice of Assessment

After the CRA processes your return, it issues a Notice of Assessment (NOA). Your NOA confirms your taxable income, tax paid, refund or balance owing, RRSP deduction limit for next year, and TFSA contribution room. Review it carefully. If you disagree with the assessment, you have 90 days from the date on the NOA to file a formal objection.

Your NOA is available instantly in CRA My Account if you filed electronically and enrolled in Express NOA. Otherwise, a paper copy arrives by mail within 4–6 weeks.

Frequently Asked Questions