T4 Source deduction payment	On or before the 15th  day of the month after the month you paid salary to employees
RRSP	First 60 days of the current year
T4 Slips Filing	February 28
Corporate taxes	Owing taxes three months after the year end – If filing six months after the year end
Personal Taxes	April 30 for filing taxes and payment of taxes
Self-Employed	If owing taxes April 30 – If filing taxes June 15