The T4 slips for wages paid in 2016 are due by the end of February 2017.
This is not a deadline that you want to miss because the penalty is $25 a day (to a maximum of 100 days).
The same deadline and penalties apply to the T5 forms, which are to be filed for any dividends paid in 2016.
Give a thought to whether there are any payments made which were not characterized as wages and should have been. What I mean by that is are you sure that you know the rules fro considering people that you pay to be employees. Is it possible that someone you think of as a subcontractor is actually an employee?
You still have a few days to get these forms prepared and filed – so get at it!