T4 Deadline March 2, 2026: What to Do If Your T4 Is Late, Missing, or Wrong (Employee Checklist)
Canada’s 2026 tax season officially begins online on February 23, 2026.
That’s when the CRA opens NETFILE and EFILE for filing your 2025 personal income tax return.
If you file early, you typically receive refunds faster and avoid last-minute issues. This checklist helps you prepare everything before NETFILE opens.
Your employer issues T4 slips showing employment income and deductions. Missing one is the most common cause of filing delays.
This includes T4A, T5, T5008, pension slips, and investment income records.
Include receipts for contributions made in 2025 and the first 60 days of 2026.
Log in early to avoid lockouts. You can view slips, notices of assessment, and NETFILE confirmations.
Errors here can cause CRA rejections or delays.
Certified software provides immediate confirmation once your return is submitted.
Direct deposit is the fastest way to receive refunds.
If you still plan to contribute for 2025, act early enough to receive your receipt.
Check carry-forward amounts and RRSP deduction limits.
Childcare, tuition, medical expenses, disability credits, and donations.
Ensure totals match your slips before submitting.
Save PDFs or scans of slips and receipts for CRA review.
NETFILE provides instant confirmation and faster processing. Paper filing takes longer and increases error risk.
When does NETFILE open for the 2025 tax year?
February 23, 2026.
Do I need CRA My Account to file?
No, but it makes accessing slips and notices much easier.
When should I start collecting receipts?
As soon as they arrive — most by late February.
Preparing before NETFILE opens helps you file faster, avoid errors, and get refunds sooner.
If you finish this checklist before February 23, you’ll be ready to file the moment NETFILE opens.
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