Paterson & Company Professional Corporation - Chartered Professional Accountants
January
1st - New Source Deductions for employees
  - New TD1, TD1 ONT for employees
10th -Source Deductions Due Threshold 1
16th - December Source Deductions Due
25th - Source Deductions Due Threshold 1
31st - Quarterly HST return due for calendar year filers (Oct/Nov/Dec)
 
February
10th - Source Deductions Due Threshold 1
14th - Reimburse employer for company car operating costs, to reduce operating benefit
15th - January Source Deductions Due
27th - Source Deductions Due Threshold 1
28th - T4 & T5 Summary and Supplementary Due
- RRSP Contribution Deadline