Important Dates (Ontario/Canada Calendar)
| Deadline | Description |
| Jan 15 | Payroll Remittances (Monthly) due |
| Feb 28 | T4 & T5 Slips must be filed and issued to employees |
| Mar 31 | T3 Trust Return filing deadline |
| Apr 30 | Personal Tax Filing & Payment deadline |
| Jun 15 | Self-Employed Personal Tax Filing deadline |
| Quarterly | HST Remittances (Depends on your filing frequency) |